CVE-2026-30851

Name	CVE-2026-30851
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
caddy (PTS)	bookworm	2.6.2-5	fixed
	trixie	2.6.2-12	fixed
	sid	2.6.2-14	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
caddy	source	(unstable)	(not affected)

- caddy <not-affected> (Vulnerable code introduced later)
https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4