PT-2026-85496 · Traefik · Traefik
CVSS v4.0
8.2
High
| Vector | AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
Traefik versions 3.7.0 through 3.7.10
Description
An authentication bypass exists in the Kubernetes Ingress NGINX provider. When an Ingress uses the
nginx.ingress.kubernetes.io/auth-tls-secret annotation, the generated TLS option is named based on the Ingress namespace and name. If two Ingress objects share the same host, client CA secret, and client-authentication mode, they produce distinct TLS option names. Traefik identifies this as a TLS options conflict and reverts to the default TLS configuration of the entry point, which does not require a client certificate. Consequently, routes configured with nginx.ingress.kubernetes.io/auth-tls-verify-client: "on" can be accessed without providing a client certificate.Recommendations
Update to version 3.7.11.
Exploit
Fix
Improper Authentication
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Weakness Enumeration
Related Identifiers
Affected Products
Traefik