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ID

VAR-202603-4755


CVE

CVE-2026-30851


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.

Trust: 1.0

sources: NVD: CVE-2026-30851

AFFECTED PRODUCTS

vendor:caddyservermodel:caddyscope:gteversion:2.10.0

Trust: 1.0

vendor:caddyservermodel:caddyscope:ltversion:2.11.2

Trust: 1.0

sources: NVD: CVE-2026-30851

CVSS

SEVERITY

CVSSV2

CVSSV3

security-advisories@github.com: CVE-2026-30851
value: HIGH

Trust: 1.0

nvd@nist.gov: CVE-2026-30851
value: HIGH

Trust: 1.0

security-advisories@github.com: CVE-2026-30851
baseSeverity: HIGH
baseScore: 8.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: NONE
exploitabilityScore: 2.8
impactScore: 5.2
version: 3.1

Trust: 1.0

nvd@nist.gov: CVE-2026-30851
baseSeverity: HIGH
baseScore: 8.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 2.8
impactScore: 5.9
version: 3.1

Trust: 1.0

sources: NVD: CVE-2026-30851 // NVD: CVE-2026-30851

PROBLEMTYPE DATA

problemtype:CWE-345

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problemtype:CWE-287

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sources: NVD: CVE-2026-30851

EXTERNAL IDS

db:NVDid:CVE-2026-30851

Trust: 1.0

sources: NVD: CVE-2026-30851

REFERENCES

url:https://github.com/caddyserver/caddy/security/advisories/ghsa-7r4p-vjf4-gxv4

Trust: 1.0

url:https://github.com/caddyserver/caddy/pull/6608

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url:https://github.com/caddyserver/caddy/issues/6610

Trust: 1.0

url:https://github.com/caddyserver/caddy/pull/7545

Trust: 1.0

sources: NVD: CVE-2026-30851

SOURCES

db:NVDid:CVE-2026-30851

LAST UPDATE DATE

2026-03-26T23:21:16.181000+00:00


SOURCES UPDATE DATE

db:NVDid:CVE-2026-30851date:2026-03-11T13:06:25.083

SOURCES RELEASE DATE

db:NVDid:CVE-2026-30851date:2026-03-07T17:15:52.540