400 lines
21 KiB
JSON
400 lines
21 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-56814",
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"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"state": "PUBLISHED",
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"assignerShortName": "EEF",
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"dateReserved": "2026-06-23T12:29:02.507Z",
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"datePublished": "2026-07-10T11:14:35.574Z",
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"dateUpdated": "2026-09-24T21:31:15.419Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://repo.hex.pm",
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"cpes": [
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"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Plug.Parsers.MULTIPART'"
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],
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"packageName": "plug",
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"packageURL": "pkg:hex/plug",
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"product": "plug",
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"programFiles": [
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"lib/plug/parsers/multipart.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart/2"
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},
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart_headers/5"
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},
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart_body/4"
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},
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart_file/4"
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}
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],
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"repo": "https://github.com/elixir-plug/plug",
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"vendor": "elixir-plug",
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"versions": [
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{
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"lessThan": "1.16.6",
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"status": "affected",
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"version": "1.4.0-rc.0",
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"versionType": "semver"
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},
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{
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"lessThan": "1.17.4",
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"status": "affected",
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"version": "1.17.0",
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"versionType": "semver"
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},
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{
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"lessThan": "1.18.5",
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"status": "affected",
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"version": "1.18.0",
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"versionType": "semver"
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},
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{
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"lessThan": "1.19.5",
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"status": "affected",
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"version": "1.19.1",
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"versionType": "semver"
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},
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{
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"lessThan": "1.20.3",
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"status": "affected",
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"version": "1.20.0",
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"versionType": "semver"
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}
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]
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},
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{
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"collectionURL": "https://github.com",
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"cpes": [
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"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Plug.Parsers.MULTIPART'"
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],
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"packageName": "elixir-plug/plug",
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"packageURL": "pkg:github/elixir-plug/plug",
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"product": "plug",
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"programFiles": [
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"lib/plug/parsers/multipart.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart/2"
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},
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart_headers/5"
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},
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart_body/4"
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},
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{
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"name": "'Elixir.Plug.Parsers.MULTIPART':parse_multipart_file/4"
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}
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],
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"repo": "https://github.com/elixir-plug/plug",
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"vendor": "elixir-plug",
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"versions": [
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{
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"changes": [
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{
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"at": "981597d3a4271ede64373c7a731702a42c500dd6",
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"status": "unaffected"
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},
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{
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"at": "56edca2ce35fe5589cd581644d8a4493fa5f484e",
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"status": "unaffected"
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},
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{
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"at": "0ee8afcc61466dc5f7a8f048d0632c899165b81f",
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"status": "unaffected"
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},
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{
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"at": "cae36053350e5215a4e0ca33cd130af9c5fc6364",
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"status": "unaffected"
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},
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{
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"at": "f7effaed811c00b5f5bf817936bfd9c5df27b7dc",
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"status": "unaffected"
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},
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{
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"at": "df97d3f17f808a9916a7700a701fb85314559d56",
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"status": "unaffected"
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}
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],
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"lessThan": "*",
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"status": "affected",
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"version": "c52b2f32c90bccd718202bafccb5f95594e30183",
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"versionType": "git"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"cpeMatch": [
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{
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"criteria": "cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.16.6",
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"versionStartIncluding": "1.4.0-rc.0",
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"vulnerable": true
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},
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{
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"criteria": "cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.17.4",
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"versionStartIncluding": "1.17.0",
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"vulnerable": true
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},
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{
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"criteria": "cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.18.5",
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"versionStartIncluding": "1.18.0",
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"vulnerable": true
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},
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{
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"criteria": "cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.19.5",
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"versionStartIncluding": "1.19.1",
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"vulnerable": true
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},
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{
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"criteria": "cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.20.3",
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"versionStartIncluding": "1.20.0",
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"vulnerable": true
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}
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],
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"negate": false,
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"operator": "OR"
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}
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],
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"operator": "AND"
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "Peter Ullrich"
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},
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{
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"lang": "en",
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"type": "analyst",
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"value": "Jonatan Männchen / EEF"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "José Valim"
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}
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],
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"datePublic": "2026-07-10T11:14:35.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p><code>Plug.Parsers.MULTIPART</code>, the multipart request-body parser used to handle file uploads and multipart forms, does not enforce its <code>:length</code> budget against all consumed resources, allowing an unauthenticated remote attacker to cause denial of service. The parser charges the <code>:length</code> limit only for part body bytes; part header bytes are never counted, and a part with an empty body costs zero.</p>\n<p>Because every part whose <code>Content-Disposition</code> carries a non-empty <code>filename</code> creates a fresh temporary file (via <code>Plug.Upload</code>) and retains a <code>Plug.Upload</code> struct for the duration of the request, an attacker can send a single request composed of many empty-body file parts. Such a request stays well under the configured <code>:length</code> limit (8,000,000 bytes by default) while creating one temporary file per part, leading to inode and disk exhaustion and unbounded memory growth. Any application using <code>Plug.Parsers</code> with the <code>:multipart</code> parser is affected, and no authentication is required, only reachability of a multipart endpoint over HTTP.</p>\n<p>This vulnerability is associated with program files <code>lib/plug/parsers/multipart.ex</code> and program routines <code>Plug.Parsers.MULTIPART.parse_multipart/2</code>, <code>Plug.Parsers.MULTIPART.parse_multipart_headers/5</code>, <code>Plug.Parsers.MULTIPART.parse_multipart_body/4</code>, and <code>Plug.Parsers.MULTIPART.parse_multipart_file/4</code>.</p>\n<p>This issue affects plug: from 1.4.0-rc.0 before 1.16.6, from 1.17.0 before 1.17.4, from 1.18.0 before 1.18.5, from 1.19.1 before 1.19.5, and from 1.20.0 before 1.20.3.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "`Plug.Parsers.MULTIPART`, the multipart request-body parser used to handle file uploads and multipart forms, does not enforce its `:length` budget against all consumed resources, allowing an unauthenticated remote attacker to cause denial of service. The parser charges the `:length` limit only for part body bytes; part header bytes are never counted, and a part with an empty body costs zero.\n\nBecause every part whose `Content-Disposition` carries a non-empty `filename` creates a fresh temporary file (via `Plug.Upload`) and retains a `Plug.Upload` struct for the duration of the request, an attacker can send a single request composed of many empty-body file parts. Such a request stays well under the configured `:length` limit (8,000,000 bytes by default) while creating one temporary file per part, leading to inode and disk exhaustion and unbounded memory growth. Any application using `Plug.Parsers` with the `:multipart` parser is affected, and no authentication is required, only reachability of a multipart endpoint over HTTP.\n\nThis vulnerability is associated with program files `lib/plug/parsers/multipart.ex` and program routines `Plug.Parsers.MULTIPART.parse_multipart/2`, `Plug.Parsers.MULTIPART.parse_multipart_headers/5`, `Plug.Parsers.MULTIPART.parse_multipart_body/4`, and `Plug.Parsers.MULTIPART.parse_multipart_file/4`.\n\nThis issue affects plug: from 1.4.0-rc.0 before 1.16.6, from 1.17.0 before 1.17.4, from 1.18.0 before 1.18.5, from 1.19.1 before 1.19.5, and from 1.20.0 before 1.20.3."
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}
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],
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"value": "Plug.Parsers.MULTIPART, the multipart request-body parser used to handle file uploads and multipart forms, does not enforce its :length budget against all consumed resources, allowing an unauthenticated remote attacker to cause denial of service. The parser charges the :length limit only for part body bytes; part header bytes are never counted, and a part with an empty body costs zero.\n\nBecause every part whose Content-Disposition carries a non-empty filename creates a fresh temporary file (via Plug.Upload) and retains a Plug.Upload struct for the duration of the request, an attacker can send a single request composed of many empty-body file parts. Such a request stays well under the configured :length limit (8,000,000 bytes by default) while creating one temporary file per part, leading to inode and disk exhaustion and unbounded memory growth. Any application using Plug.Parsers with the :multipart parser is affected, and no authentication is required, only reachability of a multipart endpoint over HTTP.\n\nThis vulnerability is associated with program files lib/plug/parsers/multipart.ex and program routines Plug.Parsers.MULTIPART.parse_multipart/2, Plug.Parsers.MULTIPART.parse_multipart_headers/5, Plug.Parsers.MULTIPART.parse_multipart_body/4, and Plug.Parsers.MULTIPART.parse_multipart_file/4.\n\nThis issue affects plug: from 1.4.0-rc.0 before 1.16.6, from 1.17.0 before 1.17.4, from 1.18.0 before 1.18.5, from 1.19.1 before 1.19.5, and from 1.20.0 before 1.20.3."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-130",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-130 Excessive Allocation"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"attackVector": "NETWORK",
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"baseScore": 6.9,
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"baseSeverity": "MEDIUM",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "LOW",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-770",
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"description": "CWE-770 Allocation of Resources Without Limits or Throttling",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"shortName": "EEF",
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"dateUpdated": "2026-09-24T21:31:15.419Z"
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},
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"references": [
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{
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"tags": [
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"vendor-advisory",
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"related"
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],
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"url": "https://github.com/elixir-plug/plug/security/advisories/GHSA-95qv-c9g9-rm63"
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},
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{
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"name": "EEF CNA record for CVE-2026-56814",
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"tags": [
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"related"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-56814.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-56814",
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"tags": [
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"related"
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],
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-56814"
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},
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{
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"name": "Introducing commit c52b2f3 in elixir-plug/plug",
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"tags": [
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"related"
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],
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"url": "https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183"
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},
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{
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"name": "Fix commit 981597d in elixir-plug/plug",
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"tags": [
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"patch"
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],
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"url": "https://github.com/elixir-plug/plug/commit/981597d3a4271ede64373c7a731702a42c500dd6"
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},
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{
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"name": "Fix commit 56edca2 in elixir-plug/plug",
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"tags": [
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"patch"
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],
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"url": "https://github.com/elixir-plug/plug/commit/56edca2ce35fe5589cd581644d8a4493fa5f484e"
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},
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{
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"name": "Fix commit 0ee8afc in elixir-plug/plug",
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"tags": [
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"patch"
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],
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"url": "https://github.com/elixir-plug/plug/commit/0ee8afcc61466dc5f7a8f048d0632c899165b81f"
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},
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{
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"name": "Fix commit cae3605 in elixir-plug/plug",
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"tags": [
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"patch"
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],
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"url": "https://github.com/elixir-plug/plug/commit/cae36053350e5215a4e0ca33cd130af9c5fc6364"
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},
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{
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"name": "Fix commit f7effae in elixir-plug/plug",
|
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"tags": [
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"patch"
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],
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"url": "https://github.com/elixir-plug/plug/commit/f7effaed811c00b5f5bf817936bfd9c5df27b7dc"
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},
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{
|
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"name": "Fix commit df97d3f in elixir-plug/plug",
|
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"tags": [
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"patch"
|
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],
|
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"url": "https://github.com/elixir-plug/plug/commit/df97d3f17f808a9916a7700a701fb85314559d56"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"title": "Plug: multipart :length limit is not charged for part headers, enabling unbounded temp-file creation (denial of service)"
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-10T14:03:11.744626Z",
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"id": "CVE-2026-56814",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-07-10T14:03:28.156Z"
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}
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}
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]
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}
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} |