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CVE-2026-30851

HIGH

8.1

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/7/2026

Last Modified3/11/2026

Sourcenvd

Honeypot Sightings0

Affected Products

caddyserver:caddy

Weaknesses (CWE)

CWE-287CWE-345

References

https://github.com/caddyserver/caddy/issues/6610(security-advisories@github.com)

https://github.com/caddyserver/caddy/pull/6608(security-advisories@github.com)

https://github.com/caddyserver/caddy/pull/7545(security-advisories@github.com)

https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4(security-advisories@github.com)

IOC Correlations

No correlations recorded

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