All vulnerabilities

Servers and applications

CVE-2026-114639

Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass because a first request preauthenticated with an Authorization: Negotiate token authenticates a socket in the globally shared backend connection pool, which is never isolated. Unauthenticated attackers on separate frontend connections can be assigned that NTLM/Kerberos-bound socket and perform reads or writes…

Severity
High 7.0
Published
22 Oct 2026
Last changed
27 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.11.58, 3.7.14
Sources
NVD

Affected software

SoftwareAffected versions
TraefikServers and applications · cpe:a:traefik:traefik
  • From 2.11.0 before 2.11.58
  • From 3.0.0 before 3.7.14

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-114639
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-114639