Low severity · published Oct 22, 2026
CVE-2026-114641
Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper
New
3.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TR
traefik · traefik
2.11.0 before 2.11.58; 3.0.0 before 3.7.14 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-114641
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-114641
Vendor Advisory
https://github.com/traefik/traefik/security/advisories/GHSA-mhjw-hmjv-p99x
Third Party Advisory
https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-race-condition-in-ntlm-kerberos-round-tripper
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