{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33806","assignerOrgId":"ce714d77-add3-4f53-aff5-83d477b104bb","state":"PUBLISHED","assignerShortName":"openjs","dateReserved":"2026-03-23T19:48:48.715Z","datePublished":"2026-04-15T00:14:02.376Z","dateUpdated":"2026-04-15T16:13:42.961Z"},"containers":{"cna":{"providerMetadata":{"orgId":"ce714d77-add3-4f53-aff5-83d477b104bb","shortName":"openjs","dateUpdated":"2026-04-15T00:14:02.376Z"},"descriptions":[{"lang":"en","value":"Impact:\n\nFastify applications using schema.body.content for per-content-type body validation can have validation bypassed entirely by prepending a space to the Content-Type header. The body is still parsed correctly but schema validation is skipped.\n\nThis is a regression introduced in fastify >= 5.3.2 by the fix for CVE-2025-32442\n\nPatches:\n\nUpgrade to fastify v5.8.5 or later.\n\nWorkarounds:\n\nNone. Upgrade to the patched version.","supportingMedia":[{"type":"text/html","base64":false,"value":"Impact:\n\nFastify applications using schema.body.content for per-content-type body validation can have validation bypassed entirely by prepending a space to the Content-Type header. The body is still parsed correctly but schema validation is skipped.\n\nThis is a regression introduced in fastify >= 5.3.2 by the fix for CVE-2025-32442\n\nPatches:\n\nUpgrade to fastify v5.8.5 or later.\n\nWorkarounds:\n\nNone. Upgrade to the patched version."}]}],"affected":[{"vendor":"fastify","product":"fastify","defaultStatus":"unaffected","versions":[{"versionType":"semver","status":"affected","version":"5.3.2","lessThan":"5.8.5"},{"versionType":"semver","status":"unaffected","version":"5.8.5"}],"packageURL":"pkg:npm/fastify"}],"references":[{"url":"https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"credits":[{"lang":"en","type":"remediation developer","value":"mcollina"},{"lang":"en","type":"remediation reviewer","value":"climba03003"},{"lang":"en","type":"remediation reviewer","value":"jsumners"},{"lang":"en","type":"remediation reviewer","value":"UlisesGascon"},{"lang":"en","type":"reporter","value":"Vyntral"}],"title":"fastify vulnerable to Body Schema Validation Bypass via Leading Space in Content-Type Header","metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1287","lang":"en","description":"CWE-1287: Improper Validation of Specified Type of Input","type":"CWE"}]}],"x_generator":{"engine":"cve-kit 1.0.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-15T14:02:12.644507Z","id":"CVE-2026-33806","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-15T16:13:42.961Z"}}]}}