CVE-2025-32431

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.

• CWE-22

• https://github.com/traefik/traefik/pull/11684Patch
• https://github.com/traefik/traefik/releases/tag/v2.11.24Release Notes
• https://github.com/traefik/traefik/releases/tag/v3.3.6Release Notes
• https://github.com/traefik/traefik/releases/tag/v3.4.0-rc2Release Notes
• https://github.com/traefik/traefik/security/advisories/GHSA-6p68-w45g-48j7Patch, Vendor Advisory

Published

Apr 21, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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