{"action":"Upgrade github.com/caddyserver/caddy/v2 to 2.11.1 or later.","affected":[{"fixed":"2.11.1","introduced":"0"}],"component":"github.com/caddyserver/caddy/v2","cve_ids":["CVE-2026-27587"],"ecosystem":"Go","epss":0.00425,"exploited":false,"fixed_versions":["2.11.1"],"ghsa_id":"GHSA-g7pc-pc7g-h8jh","id":"tcs_01M5KFAJQ6JQZX2NG36SKFBH16","modified_at":"2026-02-27T19:53:17Z","published_at":"2026-02-24T20:31:31Z","references":["https://osv.dev/vulnerability/GHSA-g7pc-pc7g-h8jh","https://github.com/caddyserver/caddy/security/advisories/GHSA-g7pc-pc7g-h8jh","https://nvd.nist.gov/vuln/detail/CVE-2026-27587","https://github.com/caddyserver/caddy/commit/a1081194bfae4e0d8c227ec44aecb95eded55d1e","https://github.com/caddyserver/caddy","https://github.com/caddyserver/caddy/releases/tag/v2.11.1","https://pkg.go.dev/vuln/GO-2026-4538"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GHSA-g7pc-pc7g-h8jh","url":"https://osv.dev/vulnerability/GHSA-g7pc-pc7g-h8jh"},{"source":"nvd","source_id":"CVE-2026-27587","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27587"}],"summary":"Caddy: MatchPath %xx (escaped-path) branch skips case normalization, enabling path-based route/auth bypass"}