CVE-2026-30851

HIGH EPSS 16.1%
Published Mar 7, 20263mo ago · Modified Mar 11, 20263mo ago
8.8 CVSS 3.1
High
Find Similar
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
8.8
Exploitability
2.8
Impact
5.9
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

VendorProductVersionRange
caddyservercaddy*≥2.10.0  –  <2.11.2

References 4

  • github.com https://github.com/caddyserver/caddy/issues/6610
    Issue Tracking
  • github.com https://github.com/caddyserver/caddy/pull/6608
    Issue TrackingPatch
  • github.com https://github.com/caddyserver/caddy/pull/7545
    Issue TrackingPatch
  • github.com https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4
    ExploitMitigationPatchVendor Advisory

Remediation

  • github.com https://github.com/caddyserver/caddy/pull/6608
    Issue TrackingPatch
  • github.com https://github.com/caddyserver/caddy/pull/7545
    Issue TrackingPatch
  • github.com https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4
    ExploitMitigationPatchVendor Advisory