GHSA-6p68-w45g-48j7
Traefik has a possible vulnerability with its path matchers
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
github.com/traefik/traefik🐹github.com/traefik/traefik/v2🐹github.com/traefik/traefik/v3🐹github.com/traefik/traefik/v3Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
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
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:
match: PathPrefix(`/service`) && !PathRegexp(`(?:(/\.\./)+.*)`)
For more information
If you have any questions or comments about this advisory, please open an issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/traefik/traefik | all versions | No fix |
| 🐹Go | github.com/traefik/traefik/v2 | all versions | 2.11.23 |
| 🐹Go | github.com/traefik/traefik/v3 | all versions | 3.3.6 |
| 🐹Go | github.com/traefik/traefik/v3 | ≥ 3.4.0-rc1&&< 3.4.0-rc2 | 3.4.0-rc2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/traefik/traefik. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
No patched version of github.com/traefik/traefik has shipped for GHSA-6p68-w45g-48j7 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-6p68-w45g-48j7 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-6p68-w45g-48j7. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-6p68-w45g-48j7 in your dependencies?
O3 detects GHSA-6p68-w45g-48j7 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.