{"id":"CVE-2026-114639","aliases":["GHSA-qm9f-w54v-q2qh"],"url":"https://o3.security/vulnerability/CVE-2026-114639","summary":"Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool","details":"Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass because a first request preauthenticated with an Authorization: Negotiate token authenticates a socket in the globally shared backend connection pool, which is never isolated. Unauthenticated attackers on separate frontend connections can be assigned that NTLM/Kerberos-bound socket and perform reads or writes with the victim's identity.","published":"2026-10-22T01:43:39.232Z","modified":"2026-10-24T02:30:54.882016256Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114639.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-qm9f-w54v-q2qh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114639"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-authentication-bypass-via-negotiate-connection-pool"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:30:54.882016256Z"}}