Exploit for Authorization Bypass Through User-Controlled Key in Traefik CVE-2026-88877

Authorization bypass in Traefik v3.7.0–v3.7.11 via from-to-www-redirect in ingress-nginx.

Published 22 Sep 2026Updated 22 Sep 2026197 sources
CVSS 9.8 ✓ VERIFIED REFERENCE

What happened

Authorization bypass in Traefik v3.7.0–v3.7.11 via from-to-www-redirect in ingress-nginx.

Affected versions

Unknown product: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references