CVE-2026-67309
Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass
Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.
| CWE | CWE-22 |
| Vendor | traefik |
| Product | traefik |
| Published | Aug 1, 2026 |
Get instant alerts for traefik traefik
Be the first to know when new unknown vulnerabilities affecting traefik traefik are published — delivered to Slack, Telegram or Discord.