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.
Details
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| github.com/traefik/traefik | โ | โ |
| github.com/traefik/traefik/v2 | โ | โ |
| github.com/traefik/traefik/v3 | โ | โ |
| traefik | 3.5.0 | 3.6.3 |
References
Similar Threats
- Medium CVE-2025-66490
- Critical CVE-2025-54386
- Critical CVE-2025-47952
- Critical CVE-2025-32431
- Medium CVE-2024-52003
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