CVE-2026-88007

CVE-2026-88007 · Traefik HTTP/3 Backend NTLM Connection Reuse

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Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection. With HTTP/3 enabled, a backend using connection-bound NTLM or Negotiate authentication, and backend keep-alive, an unrelated client can reuse a backend connection authenticated for a victim, read victim-only data, and act as that victim without the victim credentials. This issue is fixed in 2.11.57 and 3.7.13.

CVSS 9.1 · Critique · EPSS 0,6%

Publication

2026-09-10T14:47:28.270Z

Mise à jour

2026-09-10T15:38:46.602Z

Pile logicielle: web

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