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Multiple Traefik Vulnerabilities Discovered Before Version 3.7.14

Multiple Traefik Vulnerabilities Discovered Before Version 3.7.14

First seen 22 Oct 2026, 23:41 UTC •
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ThreatCluster AI
ThreatCluster •October 23, 2026 at 01:12 UTC
  • •Traefik versions before 3.7.14 are vulnerable to multiple security flaws.
  • •Issues include TLS config bypass, identity leaks, and MTLS bypass vulnerabilities.
  • •No active exploitation has been confirmed, but organizations should prepare for patches.

Several vulnerabilities affecting Traefik versions prior to 3.7.14 have been disclosed, including TLS config bypass via NTLM/Kerberos round tripper, identity leaks in FastProxy, SNI check bypass via HTTP/2 scheme, MTLS bypass via negated host matcher, and MTLS header spoofing via Ingress Nginx HTTP router. These vulnerabilities impact Traefik versions 2.11.0 to 2.11.58 and 3.0.0 to 3.7.14. The issues are categorized under various CWEs, including improper certificate validation and exposure of data elements to wrong sessions. The vulnerabilities are currently, and no has been reported. Organizations using affected versions are advised to prioritize updates as they become available.

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Timeline

2026-10-22
Vulnerabilities disclosed
Multiple vulnerabilities affecting Traefik versions before 3.7.14 were disclosed, impacting security configurations.
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Extracted Entities (4)

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Common questions

Which versions of Traefik are affected?
Traefik versions before 3.7.14, specifically 2.11.0 to 2.11.58 and 3.0.0 to 3.7.14.
Are these vulnerabilities actively exploited?
No active exploitation has been reported as of now.
What should organizations do?
Organizations should monitor for patches and apply them as soon as they are released.