CVE-2026-114639CWE-287

CVE-2026-114639

High · published October 22, 2026

CVSS v3.1
8.7
EPSS
0%
Percentile
22.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
7.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
EPSS
0.00311 · 22.7th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-10-22T06:16Z
References (2)
https://github.com/traefik/traefik/security/advisories/GHSA-qm9f-w54v-q2qh · [email protected]https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-authentication-bypass-via-negotiate-connection-pool · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 22 OCT 01:43Z
    Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool
    cvelistv5
  • 22 OCT 01:43Z
    Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool
    cvelistv5