CVE-2026-88008
CVE-2026-88008 · Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization
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Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.
CVSS 7.0 · Высокий · EPSS 0,5% · Публичный эксплойт
- Опубликовано
- Обновлено
Стек: web
Затронутые продукты и версии
traefik
- Версии
- >= 2.11.26, < 2.11.57: Затронуто
- >= 3.4.2, < 3.7.13: Затронуто
Нет опубликованного исправления
Первоисточники
- https://github.com/traefik/traefik/security/advisories/GHSA-w4v4-9rw7-5326
- https://github.com/traefik/traefik/pull/13797
- https://github.com/traefik/traefik/commit/a277e94664ffc1ce9543df552d3bbf48d4d3b8b3
- https://github.com/traefik/traefik/releases/tag/v2.11.57
- https://github.com/traefik/traefik/releases/tag/v3.7.13
- https://nvd.nist.gov/vuln/detail/CVE-2026-88008