CVE-2026-30851: Caddyserver Caddy

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forward_auth copy_headers does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2.

Affected products

• Caddyserver Caddy: from 2.10.0, before 2.11.2 (fixed in 2.11.2)

Published 2026-03-07. Last modified 2026-06-17.