CVE-2025-66491
Discovered by AISLEPUBLISHEDCWE-295
Description
Traefik is an HTTP reverse proxy and load balancer. Versions 3.5.0 through 3.6.2 have inverted TLS verification logic in the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. Setting the annotation to "on" (intending to enable backend TLS certificate verification) actually disables verification, allowing man-in-the-middle attacks against HTTPS backends when operators believe they are protected. This issue is fixed in version 3.6.3.
CVSS Base Scores
CVSS v3.1(Primary)
5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| traefik | traefik | >= 3.5.0, < 3.6.3 | affected |