CVE-2026-30851

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/caddyserver/caddy/issues/6610	Issue Tracking
https://github.com/caddyserver/caddy/pull/6608	Issue Tracking Patch
https://github.com/caddyserver/caddy/pull/7545	Issue Tracking Patch
https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4	Exploit Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-07 17:15

Updated : 2026-03-11 13:06

NVD link : CVE-2026-30851

Mitre link : CVE-2026-30851

CVE.ORG link : CVE-2026-30851

JSON object : View

Products Affected

caddyserver

caddy

CWE

CWE-287

Improper Authentication

CWE-345

Insufficient Verification of Data Authenticity

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