CVE
CVE-2026-30851
Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation
Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forwardauth copyheaders does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
C
H
U
8.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Related Resources
No items found.
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30851.json, https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4, https://nvd.nist.gov/vuln/detail/CVE-2026-30851, https://github.com/caddyserver/caddy/issues/6610, https://github.com/caddyserver/caddy/pull/6608, https://github.com/caddyserver/caddy/pull/7545
Basic Information
Ecosystem
