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🛡️ CVE-2025-32431 — traefik

🔴 CVSS 9.1 — Critical ✅ No Known Exploit CWE-22 NVD
9.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Traefik has a possible vulnerability with its path matchers

Impact

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.

Example

```yaml

apiVersion: traefik.io/v1alpha1

kind: IngressRoute

metadata:

name: my-service

spec:

routes:

  • match: PathPrefix(‘/service’)

kind: Rule

services:

  • name: service-a

port: 8080

middlewares:

  • name: my-middleware-a
  • match: PathPrefix(‘/service/sub-path’)

kind: Rule

services:

  • name: service-a

port: 8080

```

In such a case, the request http://mydomain.example.com/service/sub-path/../other-path will reach the backend my-service-a without operating the middleware my-middleware-a unless the computed path is http://mydomain.example.com/service/other-path and should be computes by the first router (operating my-middleware-a).

Patches

  • 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

Workaround

Add a PathRegexp rule to the matcher to prevent matching a route with a /../ in the path.

Example:

```yaml

match: PathPrefix(/service) && !PathRegexp((?:(/\.\./)+.*))

```

For more information

If you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: None.

Weakness class

CVE-2025-32431 is classified as CWE-22: Path Traversal. A file path built from user input is not confined to the intended directory, letting an attacker reach files elsewhere on the filesystem.

Affected software

CVE-2025-32431 is recorded against 4 packages.

  • github.com/traefik/traefik
  • github.com/traefik/traefik/v2
  • github.com/traefik/traefik/v3
  • traefik

Timeline and source

Published on 22 April 2025 and last revised on 3 March 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Advisory)
github.com (Web)
github.com (Web)
github.com (Web)

Other advisories for this package

github.com/traefik/traefik has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-22: Path Traversal) in other software:

Details

Severity HIGH
CVSS Score 9.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-22
Public Exploit ✅ No
Source NVD
Published 2025-04-22
Updated 2026-08-20
Modified 2026-03-03

Affected Packages

Software From version Fixed in
github.com/traefik/traefik — —
github.com/traefik/traefik/v2 — —
github.com/traefik/traefik/v3 — —
traefik — —

Similar Threats

Exploit Protection

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