{"action":"Upgrade fastify to 5.8.1 or later.","affected":[{"fixed":"5.8.1","introduced":"5.7.2"}],"component":"fastify","cve_ids":["CVE-2026-3419"],"ecosystem":"npm","epss":0.00365,"exploited":false,"fixed_versions":["5.8.1"],"ghsa_id":"GHSA-573f-x89g-hqp9","id":"tcs_01M5KF2WGXFC18ZMRXNA24XJ02","modified_at":"2026-07-08T08:14:43.625968787Z","published_at":"2026-03-05T21:29:54Z","references":["https://osv.dev/vulnerability/GHSA-573f-x89g-hqp9","https://github.com/fastify/fastify/security/advisories/GHSA-573f-x89g-hqp9","https://nvd.nist.gov/vuln/detail/CVE-2026-3419","https://github.com/fastify/fastify/commit/67f6c9b32cb3623d3c9470cc17ed830dd2f083d7","https://cna.openjsf.org/security-advisories.html","https://github.com/advisories/GHSA-573f-x89g-hqp9","https://github.com/fastify/fastify","https://httpwg.org/specs/rfc9110.html#field.content-type","https://www.cve.org/CVERecord?id=CVE-2026-3419"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-573f-x89g-hqp9","url":"https://osv.dev/vulnerability/GHSA-573f-x89g-hqp9"}],"summary":"Fastify's Missing End Anchor in \"subtypeNameReg\" Allows Malformed Content-Types to Pass Validation"}