Improper Handling of Case Sensitivity Affecting github.com/traefik/traefik/v2/pkg/config/static package, versions <2.11.51
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-GITHUBCOMTRAEFIKTRAEFIKV2PKGCONFIGSTATIC-17872268
- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-54763 Â (opens in a new tab)How to fix?
Upgrade github.com/traefik/traefik/v2/pkg/config/static to version 2.11.51 or higher.
Overview
Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header stripping and reach backend services.