Vulnerability · Published Oct 22, 2026 · Assigned by VulnCheck

CVE-2026-114641Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper

Low 3.7

In plain English

A low-severity race condition in traefik from traefik. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.3%top 82.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.

Affected products (as reported)

Vendor	Product	Versions
traefik	traefik	2.11.0 – before 2.11.58
traefik	traefik	3.0.0 – before 3.7.14

Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-mhjw-hmjv-p99x) vendor-advisory
VulnCheck Advisory: Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper third-party-advisory