CVE-2026-30851
HIGH EPSS 16.1%
Published Mar 7, 20263mo ago · Modified Mar 11, 20263mo ago
8.8 CVSS 3.1
Published Mar 7, 2026 3mo ago
Last Modified Mar 11, 2026 3mo ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
16.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available
Weaknesses 2
CWE-287 Improper Authentication Authentication
CWE-345
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| caddyserver | caddy | * | ≥2.10.0 – <2.11.2 |
References 4
- github.com https://github.com/caddyserver/caddy/issues/6610
- github.com https://github.com/caddyserver/caddy/pull/6608
- github.com https://github.com/caddyserver/caddy/pull/7545
- github.com https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4
Remediation
- github.com https://github.com/caddyserver/caddy/pull/6608
- github.com https://github.com/caddyserver/caddy/pull/7545
- github.com https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4