{"cve":"CVE-2026-27585","nvd":{"published":"2026-02-24T17:29:03.620","modified":"2026-06-17T10:27:20.763","status":"Analyzed","description":"Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations. Version 2.11.1 fixes the issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5},"cwes":["CWE-20"],"references":["https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L361","https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L398","https://github.com/caddyserver/caddy/releases/tag/v2.11.1","https://github.com/caddyserver/caddy/security/advisories/GHSA-4xrr-hq4w-6vf4"],"products":["caddyserver:caddy"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-27585","score":0.00367,"percentile":0.3061,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4xrr-hq4w-6vf4","url":"https://osv.dev/vulnerability/GHSA-4xrr-hq4w-6vf4","summary":"Caddy: Improper sanitization of glob characters in file matcher may lead to bypassing security protections","modified":"2026-02-27T19:51:57Z","packages":[{"ecosystem":"Go","name":"github.com/caddyserver/caddy/v2","purl":"pkg:golang/github.com/caddyserver/caddy/v2","ranges":["<2.11.1"],"fixed":["2.11.1"]}]},{"id":"GO-2026-4535","url":"https://osv.dev/vulnerability/GO-2026-4535","summary":"Improper sanitization of glob characters in github.com/caddyserver/caddy/v2","modified":"2026-02-26T19:11:17.093186Z","packages":[{"ecosystem":"Go","name":"github.com/caddyserver/caddy/v2","purl":"pkg:golang/github.com/caddyserver/caddy/v2","ranges":["<2.11.1"],"fixed":["2.11.1"]}]}],"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."]}