273 lines
13 KiB
JSON
273 lines
13 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-2026-59246",
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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": "2026-07-04T04:24:03.652Z",
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"datePublished": "2026-07-14T08:37:04.609Z",
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"dateUpdated": "2026-07-14T15:08:39.463Z"
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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-mint:mint:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Mint.HTTP2'"
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],
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"packageName": "mint",
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"packageURL": "pkg:hex/mint",
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"product": "mint",
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"programFiles": [
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"lib/mint/http2.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Mint.HTTP2':handle_continuation/3"
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},
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{
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"name": "'Elixir.Mint.HTTP2':assert_header_block_within_max_size/2"
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}
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],
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"repo": "https://github.com/elixir-mint/mint",
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"vendor": "elixir-mint",
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"versions": [
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{
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"lessThan": "1.9.2",
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"status": "affected",
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"version": "0.1.0",
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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-mint:mint:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Mint.HTTP2'"
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],
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"packageName": "elixir-mint/mint",
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"packageURL": "pkg:github/elixir-mint/mint",
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"product": "mint",
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"programFiles": [
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"lib/mint/http2.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Mint.HTTP2':handle_continuation/3"
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},
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{
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"name": "'Elixir.Mint.HTTP2':assert_header_block_within_max_size/2"
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}
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],
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"repo": "https://github.com/elixir-mint/mint",
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"vendor": "elixir-mint",
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"versions": [
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{
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"lessThan": "5779de1666344b32aefc4354184ea07f902f73ce",
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"status": "affected",
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"version": "596ca4304504be68939c4929e0831557097962b8",
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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-mint:mint:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.9.2",
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"versionStartIncluding": "0.1.0",
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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": "zx (Jace)"
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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": "Andrea Leopardi"
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},
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{
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"lang": "en",
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"type": "remediation reviewer",
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"value": "Eric Meadows-Jönsson"
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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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"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>Allocation of resources without limits vulnerability in elixir-mint mint allows a remote HTTP/2 server to exhaust memory on the client host and cause a denial of service.</p><p>The <tt>Mint.HTTP2.handle_continuation/3</tt> function in <tt>lib/mint/http2.ex</tt> accumulates the header-block fragment carried by each HTTP/2 <tt>CONTINUATION</tt> frame into a growing <tt>conn.headers_being_processed</tt> nesting, one level deeper per frame, and only releases it when a frame with the <tt>END_HEADERS</tt> flag arrives. The only guard on this accumulator is <tt>Mint.HTTP2.assert_header_block_within_max_size/2</tt>, which sums the byte size of the fragments received so far. Because a <tt>CONTINUATION</tt> frame is permitted by the protocol to carry a zero-length payload, an unbounded chain of zero-length <tt>CONTINUATION</tt> frames adds no bytes to the running total, never trips the size cap, and never emits <tt>END_HEADERS</tt>, yet each frame still nests the accumulator one level deeper.</p><p>A malicious HTTP/2 server (reachable directly, via an attacker-controlled redirect, via SSRF, or via a man-in-the-middle) can open a stream by sending a <tt>HEADERS</tt> frame without <tt>END_HEADERS</tt> and then stream zero-length <tt>CONTINUATION</tt> frames indefinitely. Client memory grows one cons cell per frame received; sustained bandwidth from the peer drives the BEAM node running the Mint client to memory exhaustion and eventual out-of-memory termination.</p><p>This issue affects mint: from 0.1.0 before 1.9.2.</p>"
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}
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],
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"value": "Allocation of resources without limits vulnerability in elixir-mint mint allows a remote HTTP/2 server to exhaust memory on the client host and cause a denial of service.\n\nThe Mint.HTTP2.handle_continuation/3 function in lib/mint/http2.ex accumulates the header-block fragment carried by each HTTP/2 CONTINUATION frame into a growing conn.headers_being_processed nesting, one level deeper per frame, and only releases it when a frame with the END_HEADERS flag arrives. The only guard on this accumulator is Mint.HTTP2.assert_header_block_within_max_size/2, which sums the byte size of the fragments received so far. Because a CONTINUATION frame is permitted by the protocol to carry a zero-length payload, an unbounded chain of zero-length CONTINUATION frames adds no bytes to the running total, never trips the size cap, and never emits END_HEADERS, yet each frame still nests the accumulator one level deeper.\n\nA malicious HTTP/2 server (reachable directly, via an attacker-controlled redirect, via SSRF, or via a man-in-the-middle) can open a stream by sending a HEADERS frame without END_HEADERS and then stream zero-length CONTINUATION frames indefinitely. Client memory grows one cons cell per frame received; sustained bandwidth from the peer drives the BEAM node running the Mint client to memory exhaustion and eventual out-of-memory termination.\n\nThis issue affects mint: from 0.1.0 before 1.9.2."
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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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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 6.3,
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"baseSeverity": "MEDIUM",
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"privilegesRequired": "NONE",
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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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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/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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},
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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": "2026-07-14T15:08:39.463Z"
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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-mint/mint/security/advisories/GHSA-8pf6-g464-h6h9"
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},
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{
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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-2026-59246.html"
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},
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{
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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-2026-59246"
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},
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{
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"tags": [
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"patch"
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],
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"url": "https://github.com/elixir-mint/mint/commit/5779de1666344b32aefc4354184ea07f902f73ce"
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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": "Zero-length HTTP/2 CONTINUATION frames bypass Mint's header-block byte-size cap and exhaust client memory",
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"x_generator": {
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"engine": "cvelib 1.8.0"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-8pf6-g464-h6h9",
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"tags": [
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"exploit"
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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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-14T12:25:59.949476Z",
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"id": "CVE-2026-59246",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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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": "2026-07-14T12:26:05.211Z"
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}
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}
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]
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}
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} |