{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-30851", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-05T21:27:35.341Z", "datePublished": "2026-03-07T16:28:37.097Z", "dateUpdated": "2026-03-07T16:28:37.097Z"}, "containers": {"cna": {"title": "Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-345", "lang": "en", "description": "CWE-345: Insufficient Verification of Data Authenticity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4"}, {"name": "https://github.com/caddyserver/caddy/issues/6610", "tags": ["x_refsource_MISC"], "url": "https://github.com/caddyserver/caddy/issues/6610"}, {"name": "https://github.com/caddyserver/caddy/pull/6608", "tags": ["x_refsource_MISC"], "url": "https://github.com/caddyserver/caddy/pull/6608"}, {"name": "https://github.com/caddyserver/caddy/pull/7545", "tags": ["x_refsource_MISC"], "url": "https://github.com/caddyserver/caddy/pull/7545"}], "affected": [{"vendor": "caddyserver", "product": "caddy", "versions": [{"version": ">= 2.10.0, < 2.11.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-07T16:28:37.097Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-7r4p-vjf4-gxv4", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-30851", "lastModified": "2026-03-09T13:35:07.393", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-07T17:15:52.540", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/caddyserver/caddy/issues/6610"}, {"source": "security-advisories@github.com", "url": "https://github.com/caddyserver/caddy/pull/6608"}, {"source": "security-advisories@github.com", "url": "https://github.com/caddyserver/caddy/pull/7545"}, {"source": "security-advisories@github.com", "url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}, {"lang": "en", "value": "CWE-345"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.10.0,2.11.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "caddy", "source": "cna", "vendor": "caddyserver"}, "product": "caddy", "vendor": "caddyserver"}], "created": "2026-03-09T10:04:56.316446+00:00", "updated": "2026-03-09T10:04:56.316523+00:00", "vendors": ["caddyserver", "caddyserver$PRODUCT$caddy"]}