Improper Handling of Case Sensitivity Affecting traefik-2 package, versions *


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-TRAEFIK2-17922538
  • published10 Jul 2026
  • disclosed6 Jul 2026

Introduced: 6 Jul 2026

CVE-2026-54763  (opens in a new tab)
CWE-178  (opens in a new tab)
CWE-290  (opens in a new tab)
CWE-345  (opens in a new tab)

How to fix?

There is no fixed version for Minimos:latest traefik-2.

NVD Description

Note: Versions mentioned in the description apply only to the upstream traefik-2 package and not the traefik-2 package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's BasicAuth, DigestAuth, and ForwardAuth middlewares strip canonical-cased spoofed identity headers before writing Traefik's own value, but do not account for underscore-variant header names, which many backends normalize identically to dashed forms. An attacker able to reach a protected route can inject an underscore-variant header that survives Traefik's stripping and reaches the backend alongside, or on the unauthenticated ForwardAuth authResponseHeaders path instead of, the value Traefik intended to set, spoofing identity or authorization context. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.

CVSS Base Scores

version 3.1