Interpretation Conflict Affecting github.com/traefik/traefik/pkg/server package, versions <2.11.32>=3.0.0-beta1 <3.6.3
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMTRAEFIKTRAEFIKPKGSERVER-14236440
- published10 Dec 2025
- disclosed8 Dec 2025
- creditMohamed Ahmed Abd Elmohsen Hashem
Introduced: 8 Dec 2025
CVE-2025-66490 Â (opens in a new tab)How to fix?
Upgrade github.com/traefik/traefik/pkg/server to version 2.11.32, 3.6.3 or higher.
Overview
Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with URL-encoded restricted characters in the path, which bypasses middleware and security controls.