CVE-2026-114639Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Received
- Record last updated
- Oct 22, 2026
- First seen by InfoSec Signals
- Oct 22, 2026
Affected products
traefik traefik traefik:traefik (from the name) | from 2.11.0 before 2.11.58; 2.11.58 not affected | CNA record |
References
- https://github.com/traefik/traefik/security/advisories/GHSA-qm9f-w54v-q2qhvendor-advisory
- https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-authentication-bypass-via-negotiate-connection-poolthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.