{"action":"Upgrade @fastify/express to 4.0.3 or later.","affected":[{"fixed":"4.0.3","introduced":"0"}],"component":"@fastify/express","cve_ids":["CVE-2026-22037"],"ecosystem":"npm","epss":0.00349,"exploited":false,"fixed_versions":["4.0.3"],"ghsa_id":"GHSA-g6q3-96cp-5r5m","id":"tcs_01M5KFQC2WSYPQ1J4RXWJEG89B","modified_at":"2026-02-03T03:03:59.297504Z","published_at":"2026-01-20T16:35:21Z","references":["https://osv.dev/vulnerability/GHSA-g6q3-96cp-5r5m","https://github.com/fastify/fastify-express/security/advisories/GHSA-g6q3-96cp-5r5m","https://nvd.nist.gov/vuln/detail/CVE-2026-22037","https://github.com/fastify/fastify-express/commit/dc02a3fe1387f945143f22597baa42557d549a40","https://github.com/fastify/fastify-express","https://github.com/fastify/fastify-express/releases/tag/v4.0.3"],"severity":{"label":"high","score":8.4},"sources":[{"source":"osv","source_id":"GHSA-g6q3-96cp-5r5m","url":"https://osv.dev/vulnerability/GHSA-g6q3-96cp-5r5m"}],"summary":"@fastify/express vulnerable to Improper Handling of URL Encoding (Hex Encoding)"}