Insufficient Verification of Data Authenticity Affecting github.com/traefik/traefik/v3/pkg/middlewares/auth package, versions >=3.0.0 <3.6.22>=3.7.0 <3.7.6
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.
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- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-54764 (opens in a new tab)How to fix?
Upgrade github.com/traefik/traefik/v3/pkg/middlewares/auth to version 3.6.22, 3.7.6 or higher.
Overview
Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the ForwardAuth process when trustForwardHeader is set to false. An attacker can bypass port-based authorization checks by injecting a crafted X-Forwarded-Proto header over an unencrypted HTTP connection, causing the system to forward an incorrect X-Forwarded-Port value to the authentication service.