CVE-2026-88007

Descripción original

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.

Software afectado

• Traefik ≥ 2.8.2 < 2.11.56*≥ 3.0.0 < 3.7.12 Corregido en: 2.11.56, 3.7.12 coincidencia exacta

Detalles

Publicación

2026-09-10

Última modificación

2026-09-11

Vector CVSS

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-287, CWE-863

Referencias

• cve.org/CVE-2026-88007
• nvd.nist.gov/vuln/detail/CVE-2026-88007
• github.com/traefik/traefik/security/advisories/GHSA-qqjf-53cj-pwvv
• github.com/traefik/traefik/pull/13812
• github.com/traefik/traefik/commit/ff39c47d7459dec9cd8de63c1a4e7aa7315bdc1c
• github.com/traefik/traefik/releases/tag/v2.11.57
• github.com/traefik/traefik/releases/tag/v3.7.13