{"cve":"CVE-2026-30851","nvd":{"published":"2026-03-07T17:15:52.540","modified":"2026-06-17T10:33:01.980","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-287","CWE-345"],"references":["https://github.com/caddyserver/caddy/issues/6610","https://github.com/caddyserver/caddy/pull/6608","https://github.com/caddyserver/caddy/pull/7545","https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4"],"products":["caddyserver:caddy"],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-30851","score":0.00259,"percentile":0.17614,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-7r4p-vjf4-gxv4","url":"https://osv.dev/vulnerability/GHSA-7r4p-vjf4-gxv4","summary":"Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation","modified":"2026-03-23T04:56:09.052625584Z","packages":[{"ecosystem":"Go","name":"github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy","purl":"pkg:golang/github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy","ranges":[">=2.10.0 <2.11.2"],"fixed":["2.11.2"]}]},{"id":"GO-2026-4639","url":"https://osv.dev/vulnerability/GO-2026-4639","summary":"Caddy forward_auth copy_headers allows Identity Injection and Privilege Escalation in github.com/caddyserver/caddy","modified":"2026-03-23T04:52:47.652974Z","packages":[{"ecosystem":"Go","name":"github.com/caddyserver/caddy/v2","purl":"pkg:golang/github.com/caddyserver/caddy/v2","ranges":[">=2.10.0 <2.11.2"],"fixed":["2.11.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}