CVE-2026-71326 Traefik: BasicAuth singleflight key collision allows authenticated identity spoofing

Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.6.25 and 3.7.10, Traefik's BasicAuth middleware in pkg/middlewares/auth/basicauth.go deduplicates concurrent password checks with a singleflight key built from the delimiter-free concatenation of password and...