CVE-2026-114641
Published:October 22, 2026
Updated:October 22, 2026
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 Packages
https://github.com/traefik/traefik.git (GITHUB):
Affected version(s) >=v3.0.0-rc1 <v3.7.14Fix Suggestion:
Update to version v3.7.14https://github.com/traefik/traefik.git (GITHUB):
Affected version(s) >=v2.11.0 <v2.11.58Fix Suggestion:
Update to version v2.11.58github.com/traefik/traefik/v2 (GO):
Affected version(s) >=v2.11.0 <v2.11.58Fix Suggestion:
Update to version v2.11.58github.com/traefik/traefik/v3 (GO):
Affected version(s) >=v3.0.0-rc1 <v3.7.14Fix Suggestion:
Update to version v3.7.14Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
EPSS
Base Score:
0.26