CVE-2026-114641 MEDIUM

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

Vendor Traefik
Product traefik
Weakness CWE-362
Published October 22, 2026
Last update October 22, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 22, 2026 CVE published