CVE-2025-32431 Information

Description

Traefik (pronounced traffic) is an HTTP reverse proxy and load balancer. In versions prior to 2.11.24 3.3.6 and 3.4.0-rc2. There is a potential vulnerability in Traefik managing the requests using a PathPrefix Path or PathRegex matcher. When Traefik is configured to route the requests to a backend using a matcher based on the path if the URL contains a /../ in its path it’s possible to target a backend exposed using another router by-passing the middlewares chain. This issue has been patched in versions 2.11.24 3.3.6 and 3.4.0-rc2. A workaround involves adding a PathRegexp rule to the matcher to prevent matching a route with a /../ in the path.

Reference

https://github.com/traefik/traefik/pull/11684 https://github.com/traefik/traefik/releases/tag/v2.11.24 https://github.com/traefik/traefik/releases/tag/v3.3.6 https://github.com/traefik/traefik/releases/tag/v3.4.0-rc2 https://github.com/traefik/traefik/security/advisories/GHSA-6p68-w45g-48j7