Multiples vulnérabilités dans Traefik (21 août 2026)
Multiple vulnerabilities have been discovered in Traefik, allowing attackers to bypass security policies. These vulnerabilities affect older versions of the popular reverse proxy and load balancer, requiring immediate patching to prevent exploitation.
CERT-FR has reported several security vulnerabilities within Traefik. These vulnerabilities allow an attacker to circumvent the security policy, potentially leading to unauthorized access or control. The affected versions of Traefik include all versions prior to v2.11.55 and all versions of Traefik v3.x prior to v3.7.11. Users are advised to consult the provided security bulletins for specific patching instructions. The bulletin of security Traefik GHSA-5w68-77r2-r64c from August 21, 2026, is available at https://github.com/traefik/traefik/security/advisories/GHSA-5w68-77r2-r64c, and the bulletin of security Traefik GHSA-g55h-rg46-x9c5 from August 21, 2026, is available at https://github.com/traefik/traefik/security/advisories/GHSA-g55h-rg46-x9c5, and the bulletin of security Traefik GHSA-j994-9gqj-9hwq from August 21, 2026, is available at https://github.com/traefik/traefik/security/advisories/GHSA-j994-9gqj-9hwq, and the bulletin of security Traefik GHSA-m6wx-622r-48r9 from August 21, 2026, is available at https://github.com/traefik/traefik/security/advisories/GHSA-m6wx-622r-48r9.