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

What is CVE-2026-114641?

CVE-2026-114641 is a medium-severity vulnerability in Traefik Traefik, published on 22 Oct 2026.

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.

Weakness: CWE-362

Which versions are affected by CVE-2026-114641?

It affects 1 product.

Products include Traefik Traefik.

How do I fix CVE-2026-114641?

Upgrade to a fixed version.

Is CVE-2026-114641 being exploited?

There is no known exploitation of CVE-2026-114641 in the wild and no public exploit code.

Other vulnerabilities in Traefik Traefik

• CVE-2024-45410 HTTP client can remove the X-Forwarded headers in Traefik Critical 9.8
• CVE-2026-88877 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect Critical 9.3
• CVE-2026-85595 Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth Critical 9.3
• CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse Critical 9.1
• CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging High 8.8

All Traefik Traefik vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-mhjw-hmjv-p99x, GHSA-q9pf-jh7g-83mc.