CVE-2026-30851

8.1 HIGH
Published: March 07, 2026 Modified: March 11, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.1 / 10.0
EPSS (Exploit Probability)
0.0%
4th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

caddyserver