283 lines
13 KiB
JSON
283 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-2026-58226",
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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": "2026-06-29T18:54:08.633Z",
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"datePublished": "2026-07-06T09:03:47.374Z",
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"dateUpdated": "2026-07-06T14:04:14.632Z"
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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:hpax:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"Elixir.HPAX",
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"Elixir.HPAX.Types"
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],
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"packageName": "hpax",
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"packageURL": "pkg:hex/hpax",
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"product": "hpax",
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"programFiles": [
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"lib/hpax.ex",
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"lib/hpax/types.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.HPAX':decode/2"
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},
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{
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"name": "'Elixir.HPAX.Types':decode_integer/2"
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},
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{
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"name": "'Elixir.HPAX.Types':decode_remaining_integer/3"
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}
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],
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"repo": "https://github.com/elixir-mint/hpax",
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"vendor": "elixir-mint",
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"versions": [
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{
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"lessThan": "1.0.4",
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"status": "affected",
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"version": "0.1.1",
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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:hpax:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"Elixir.HPAX",
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"Elixir.HPAX.Types"
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],
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"packageName": "elixir-mint/hpax",
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"packageURL": "pkg:github/elixir-mint/hpax",
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"product": "hpax",
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"programFiles": [
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"lib/hpax.ex",
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"lib/hpax/types.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.HPAX':decode/2"
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},
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{
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"name": "'Elixir.HPAX.Types':decode_integer/2"
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},
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{
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"name": "'Elixir.HPAX.Types':decode_remaining_integer/3"
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}
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],
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"repo": "https://github.com/elixir-mint/hpax",
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"vendor": "elixir-mint",
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"versions": [
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{
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"lessThan": "1ba4bb2dc91e80089cf89c73970ac3ded76f17eb",
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"status": "affected",
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"version": "56db437a7e2c515e3bdd770ac7947b02cd2390d0",
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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:hpax:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.0.4",
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"versionStartIncluding": "0.1.1",
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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": "AND"
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}
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],
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"operator": "OR"
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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": "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": "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": "analyst",
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"value": "Eric Meadows-Jönsson"
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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>Inefficient Algorithmic Complexity vulnerability in elixir-mint hpax allows unauthenticated denial-of-service via unbounded HPACK integer decoding.</p><p><tt>hpax</tt> decodes HPACK variable-length integers with no upper bound on the decoded value or the number of continuation octets. <tt>'Elixir.HPAX.Types':decode_remaining_integer/3</tt> accumulates the integer as <tt>int + (value <<< m)</tt>, shifting by 7 more bits for each continuation octet and stopping only on a terminating octet or truncated input, never because the integer grew too large. Because BEAM integers are arbitrary precision, a run of N continuation octets builds an O(N)-bit bignum and re-adds into an ever-larger bignum on each step, so the total decoding cost is superlinear (about O(N^2)). An unauthenticated attacker who can send an HTTP/2 header block to a server using this decoder (reached through the <tt>'Elixir.HPAX':decode/2</tt> entry point) can supply a small header block that forces a large, attacker-controlled amount of CPU (and transient memory), a denial-of-service amplification.</p><p>This issue affects <tt>hpax</tt> from 0.1.1 before 1.0.4.</p>"
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}
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],
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"value": "Inefficient Algorithmic Complexity vulnerability in elixir-mint hpax allows unauthenticated denial-of-service via unbounded HPACK integer decoding.\n\nhpax decodes HPACK variable-length integers with no upper bound on the decoded value or the number of continuation octets. 'Elixir.HPAX.Types':decode_remaining_integer/3 accumulates the integer as int + (value <<< m), shifting by 7 more bits for each continuation octet and stopping only on a terminating octet or truncated input, never because the integer grew too large. Because BEAM integers are arbitrary precision, a run of N continuation octets builds an O(N)-bit bignum and re-adds into an ever-larger bignum on each step, so the total decoding cost is superlinear (about O(N^2)). An unauthenticated attacker who can send an HTTP/2 header block to a server using this decoder (reached through the 'Elixir.HPAX':decode/2 entry point) can supply a small header block that forces a large, attacker-controlled amount of CPU (and transient memory), a denial-of-service amplification.\n\nThis issue affects hpax from 0.1.1 before 1.0.4."
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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": "NONE",
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"attackVector": "NETWORK",
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"baseScore": 8.7,
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"baseSeverity": "HIGH",
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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:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "HIGH",
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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-407",
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"description": "CWE-407 Inefficient Algorithmic Complexity",
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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": "2026-07-06T14:04:14.632Z"
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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/hpax/security/advisories/GHSA-jj2p-32j7-whj2"
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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-2026-58226.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-2026-58226"
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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/hpax/commit/1ba4bb2dc91e80089cf89c73970ac3ded76f17eb"
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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": "Unauthenticated denial-of-service via unbounded HPACK integer decoding in hpax",
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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/hpax/security/advisories/GHSA-jj2p-32j7-whj2",
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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": "2026-07-06T12:49:38.954923Z",
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"id": "CVE-2026-58226",
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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": "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": "2026-07-06T12:49:52.028Z"
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}
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}
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]
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}
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} |