CVE-2025-32431
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.
How to fix
- traefik traefik2.11.24, 3.3.6 or later
- github.com/traefik/traefik/v22.11.23 or later
- github.com/traefik/traefik/v33.3.6, 3.4.0-rc2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| traefik traefik | v < 2.11.24, 3.0.0 ≤ v < 3.3.6, 3.4.0 | 2.11.24, 3.3.6 |
| github.com/traefik/traefikGo | v ≤ 1.7.34, No range specified | — |
| github.com/traefik/traefik/v2Go | v < 2.11.23 | 2.11.23 |
| github.com/traefik/traefik/v3Go | v < 3.3.6, 3.4.0-rc1 ≤ v < 3.4.0-rc2 | 3.3.6, 3.4.0-rc2 |
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