{"action":"Upgrade github.com/caddyserver/caddy/v2 to 2.11.4 or later.","affected":[{"fixed":"2.11.4","introduced":"0"}],"component":"github.com/caddyserver/caddy/v2","cve_ids":["CVE-2026-52845"],"ecosystem":"Go","epss":0.00445,"exploited":false,"fixed_versions":["2.11.4"],"ghsa_id":"GHSA-f59h-q822-g45g","id":"tcs_01M5KGKNA9S5TZC0ESPSWNGB2G","modified_at":"2026-07-24T19:00:22.820653013Z","published_at":"2026-07-24T18:35:55Z","references":["https://osv.dev/vulnerability/GO-2026-5346","https://github.com/caddyserver/caddy/security/advisories/GHSA-f59h-q822-g45g","https://github.com/caddyserver/caddy/pull/7633"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"GO-2026-5346","url":"https://osv.dev/vulnerability/GO-2026-5346"},{"source":"nvd","source_id":"CVE-2026-52845","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52845"}],"summary":"Caddy: FastCGI header normalization bypass in forward_auth copy_headers in github.com/caddyserver/caddy"}