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CVE-2026-114641

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: web

Affected products and versions

  • traefik

    Versions
    • ≥ 2.11.0, < 2.11.58: Affected (semver)
    • 2.11.58: Not affected (semver)

    Update to 2.11.58

  • traefik

    Versions
    • ≥ 3.0.0, < 3.7.14: Affected (semver)
    • 3.7.14: Not affected (semver)

    Update to 3.7.14

Original sources

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