Timing Attack Affecting github.com/traefik/traefik/v2/pkg/middlewares/auth package, versions <2.11.43
Threat Intelligence
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMTRAEFIKTRAEFIKV2PKGMIDDLEWARESAUTH-16304777
- published27 Apr 2026
- disclosed24 Apr 2026
- creditkodareef5
Introduced: 24 Apr 2026
CVE-2026-41263 Â (opens in a new tab)How to fix?
Upgrade github.com/traefik/traefik/v2/pkg/middlewares/auth to version 2.11.43 or higher.
Overview
github.com/traefik/traefik/v2/pkg/middlewares/auth is a Cloud Native Application Proxy.
Affected versions of this package are vulnerable to Timing Attack via the BasicAuth process. An attacker can enumerate valid usernames by measuring authentication response times, exploiting differences in processing between existing and non-existing users.