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CVE

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_a

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.

HIGH · CVSS 8.1 EPSS 0.00023
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-287Improper Authentication
CWE-345Insufficient Verification of Data Authenticity
▤

Affected Products & Versions

1
caddyserver caddy>= 2.10.0 and < 2.11.2
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/caddyserver/caddy/v2 fixed in 2.11.2
Go github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy HIGH fixed in 2.11.2
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-7r4p-vjf4-gxv4github.com
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Mar 2026 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/caddyserver/caddy/issues/6610Issue Tracking
https://github.com/caddyserver/caddy/pull/6608Issue TrackingPatch
https://github.com/caddyserver/caddy/pull/7545Issue TrackingPatch
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