CVSS 4.0
8.8 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:PCVE-2025-32431
High (8.8) in traefik traefik. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in github.com/traefik/traefik/v2 2.11.23.
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.
Severity
CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Affected
- traefik:traefik
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6p68-w45g-48j7 | Go | github.com/traefik/traefik | <=1.7.34 | no fix published |
| GHSA-6p68-w45g-48j7 | Go | github.com/traefik/traefik/v2 | <2.11.23 | 2.11.23 |
| GHSA-6p68-w45g-48j7 | Go | github.com/traefik/traefik/v3 | <3.3.6 | 3.3.6 |
| GHSA-6p68-w45g-48j7 | Go | github.com/traefik/traefik/v3 | >=3.4.0-rc1 <3.4.0-rc2 | 3.4.0-rc2 |
| GO-2025-3634 | Go | github.com/traefik/traefik | all versions | no fix published |
| GO-2025-3634 | Go | github.com/traefik/traefik/v2 | <2.11.23 | 2.11.23 |
| GO-2025-3634 | Go | github.com/traefik/traefik/v3 | <3.3.6 >=3.4.0-rc1 <3.4.0-rc2 | 3.3.6, 3.4.0-rc2 |