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 · Средний · EPSS 0,3%
- Опубликовано
- Обновлено
Стек: web
Затронутые продукты и версии
traefik
- Версии
- < 2.11.51: Затронуто
- >= 3.0.0, < 3.6.22: Затронуто
- >= 3.7.0, < 3.7.6: Затронуто
Нет опубликованного исправления