{"action":"Upgrade @fastify/express to 4.0.5 or later.","affected":[{"fixed":"4.0.5","introduced":"0"}],"component":"@fastify/express","cve_ids":["CVE-2026-33807"],"ecosystem":"npm","epss":0.0043,"exploited":false,"fixed_versions":["4.0.5"],"ghsa_id":"GHSA-hrwm-hgmj-7p9c","id":"tcs_01M5KFW160TNF1XMWB05A1547R","modified_at":"2026-07-08T08:14:43.215388971Z","published_at":"2026-04-16T01:03:25Z","references":["https://osv.dev/vulnerability/GHSA-hrwm-hgmj-7p9c","https://github.com/fastify/fastify-express/security/advisories/GHSA-hrwm-hgmj-7p9c","https://nvd.nist.gov/vuln/detail/CVE-2026-33807","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-hrwm-hgmj-7p9c","url":"https://osv.dev/vulnerability/GHSA-hrwm-hgmj-7p9c"}],"summary":"@fastify/express's middleware path doubling causes authentication bypass in child plugin scopes"}