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vuln-cve/data/2026/88xxx/CVE-2026-88007.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-88007",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-09-09T19:19:27.406Z",
"datePublished": "2026-09-10T14:47:28.270Z",
"dateUpdated": "2026-09-10T15:38:46.602Z"
},
"containers": {
"cna": {
"title": "Traefik HTTP/3 Backend NTLM Connection Reuse",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"lang": "en",
"description": "CWE-287: Improper Authentication",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-863",
"lang": "en",
"description": "CWE-863: Incorrect Authorization",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/traefik/traefik/security/advisories/GHSA-qqjf-53cj-pwvv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/traefik/traefik/security/advisories/GHSA-qqjf-53cj-pwvv"
},
{
"name": "https://github.com/traefik/traefik/pull/13812",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/traefik/traefik/pull/13812"
},
{
"name": "https://github.com/traefik/traefik/commit/ff39c47d7459dec9cd8de63c1a4e7aa7315bdc1c",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/traefik/traefik/commit/ff39c47d7459dec9cd8de63c1a4e7aa7315bdc1c"
},
{
"name": "https://github.com/traefik/traefik/releases/tag/v2.11.57",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/traefik/traefik/releases/tag/v2.11.57"
},
{
"name": "https://github.com/traefik/traefik/releases/tag/v3.7.13",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/traefik/traefik/releases/tag/v3.7.13"
}
],
"affected": [
{
"vendor": "traefik",
"product": "traefik",
"versions": [
{
"version": ">= 2.11.0, < 2.11.57",
"status": "affected"
},
{
"version": ">= 3.0.0, < 3.7.13",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-09-10T14:47:28.270Z"
},
"descriptions": [
{
"lang": "en",
"value": "Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection. With HTTP/3 enabled, a backend using connection-bound NTLM or Negotiate authentication, and backend keep-alive, an unrelated client can reuse a backend connection authenticated for a victim, read victim-only data, and act as that victim without the victim credentials. This issue is fixed in 2.11.57 and 3.7.13."
}
],
"source": {
"advisory": "GHSA-qqjf-53cj-pwvv",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-10T15:38:41.123784Z",
"id": "CVE-2026-88007",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-10T15:38:46.602Z"
}
}
]
}
}