Authentication Bypass

Traefik is vulnerable to Authentication Bypass. The vulnerability is due to improper handling in the ForwardAuth middleware when trustForwardHeader=false is configured behind a trusted upstream proxy, which allows an attacker to bypass authentication controls and gain unauthorized access...

CVE-2026-35051

A flaw was found in Traefik, an HTTP reverse proxy and load balancer. This authentication bypass vulnerability exists in Traefik's ForwardAuth middleware when the trustForwardHeader setting is configured as false and Traefik is deployed behind a trusted upstream proxy. A remote attacker could...

SUSE CVE-2026-35051

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issu...

Traefik < 2.11.43 / 3.x < 3.6.14 Multiple Vulnerabilities

The version of Traefik installed on the remote macOS host is prior to 2.11.43 or 3.x prior to 3.6.14. It is, therefore, affected by multiple vulnerabilities: - An authentication bypass via StripPrefixRegex and ForwardAuth dot-segment normalization. When StripPrefixRegex processes URLs with...

EUVD-2026-26426

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issu...

Traefik 数据伪造问题漏洞

Traefik is an open-source reverse proxy and load balancing tool developed by Traefik. Versions prior to Traefik 2.11.43, 3.6.14, and 3.7.0-rc.2 contained a data manipulation vulnerability. This vulnerability stems from the ForwardAuth middleware, which has a authentication bypass vulnerability wh...

Insufficient Verification of Data Authenticity

Overview Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the ForwardAuth middleware when trustForwardHeader is set to false and the deployment is behind a trusted upstream proxy. An attacker can gain unauthorized access to protected backend...

Insufficient Verification of Data Authenticity

Overview Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the ForwardAuth middleware when trustForwardHeader is set to false and the deployment is behind a trusted upstream proxy. An attacker can gain unauthorized access to protected backend...

Traefik's ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass authentication

Summary There is a high-severity authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. While X-Forwarded- headers such as X-Forwarded-For, X-Forwarded-Host, and X-Forwarded-Proto...

PT-2026-36177

Name of the Vulnerable Software and Affected Versions Traefik versions prior to 2.11.43 Traefik versions prior to 3.6.14 Traefik versions prior to 3.7.0-rc.2 Description An authentication bypass exists in the ForwardAuth middleware of Traefik, an HTTP reverse proxy and load balancer. This occurs...