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CVE-2026-54764

CVE-2026-54764 · ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false

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Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's ForwardAuth middleware, even when configured with trustForwardHeader: false, derives the X-Forwarded-Port header sent to the authentication service from the original incoming request instead of the sanitized forwarded request. As a result, an unauthenticated remote attacker can inject an X-Forwarded-Proto: https header over a plain HTTP connection and cause Traefik to forward X-Forwarded-Port: 443 to the authentication service, bypassing port-based authorization checks. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.

CVSS 6.9 · Moyenne · EPSS 0,3%

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Mise à jour

Pile logicielle: web

Produits et versions concernés

  • traefik

    Versions du logiciel
    • < 2.11.51: Concernée
    • >= 3.0.0, < 3.6.22: Concernée
    • >= 3.7.0, < 3.7.6: Concernée

    Aucun correctif publié

Sources originales

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