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.

PUBLISHED Reserved 2026-03-05 | Published 2026-03-07 | Updated 2026-03-07 | Assigner GitHub_M

Problem types

CWE-287: Improper Authentication

CWE-345: Insufficient Verification of Data Authenticity

Product status

References

github.com/.../caddy/security/advisories/GHSA-7r4p-vjf4-gxv4

github.com/caddyserver/caddy/issues/6610

github.com/caddyserver/caddy/pull/6608

github.com/caddyserver/caddy/pull/7545

cve.org (CVE-2026-30851)

nvd.nist.gov (CVE-2026-30851)

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