{"action":"Upgrade fastify to 5.7.2 or later.","affected":[{"fixed":"5.7.2","introduced":"0"}],"component":"fastify","cve_ids":["CVE-2026-25223"],"ecosystem":"npm","epss":0.00875,"exploited":false,"fixed_versions":["5.7.2"],"ghsa_id":"GHSA-jx2c-rxcm-jvmq","id":"tcs_01M5KFZ4Q776VCAB93EC0Y1GYR","modified_at":"2026-02-04T18:07:32.787861Z","published_at":"2026-02-02T22:23:29Z","references":["https://osv.dev/vulnerability/GHSA-jx2c-rxcm-jvmq","https://github.com/fastify/fastify/security/advisories/GHSA-jx2c-rxcm-jvmq","https://nvd.nist.gov/vuln/detail/CVE-2026-25223","https://github.com/fastify/fastify/commit/32d7b6add39ddf082d92579a58bea7018c5ac821","https://hackerone.com/reports/3464114","https://fastify.dev/docs/latest/Reference/Validation-and-Serialization","https://github.com/fastify/fastify","https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/content-type-parser.js#L125","https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/validation.js#L272"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-jx2c-rxcm-jvmq","url":"https://osv.dev/vulnerability/GHSA-jx2c-rxcm-jvmq"}],"summary":"Fastify's Content-Type header tab character allows body validation bypass"}