{"action":"Upgrade @fastify/express to 4.0.5 or later.","affected":[{"fixed":"4.0.5","introduced":"0"}],"component":"@fastify/express","cve_ids":["CVE-2026-33808"],"ecosystem":"npm","epss":0.00483,"exploited":false,"fixed_versions":["4.0.5"],"ghsa_id":"GHSA-6hw5-45gm-fj88","id":"tcs_01M5KF781QJ6QMV6XQ015RHFWS","modified_at":"2026-09-10T03:50:43.432371441Z","published_at":"2026-04-16T01:03:46Z","references":["https://osv.dev/vulnerability/GHSA-6hw5-45gm-fj88","https://github.com/fastify/fastify-express/security/advisories/GHSA-6hw5-45gm-fj88","https://nvd.nist.gov/vuln/detail/CVE-2026-33808","https://cna.openjsf.org/security-advisories.html","https://github.com/fastify/fastify-express"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GHSA-6hw5-45gm-fj88","url":"https://osv.dev/vulnerability/GHSA-6hw5-45gm-fj88"}],"summary":"@fastify/express has a middleware authentication bypass via URL normalization gaps (duplicate slashes and semicolons)"}