CVE-2026-33806

{"id": "CVE-2026-33806", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-04-15T04:17:36.650", "references": [{"url": "https://cna.openjsf.org/security-advisories.html", "tags": ["Vendor Advisory"], "source": "ce714d77-add3-4f53-aff5-83d477b104bb"}, {"url": "https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc", "tags": ["Not Applicable"], "source": "ce714d77-add3-4f53-aff5-83d477b104bb"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "description": [{"lang": "en", "value": "CWE-1287"}]}], "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."}], "lastModified": "2026-04-17T15:49:28.733", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "F05DA184-C206-4A06-A5BA-97FBB69A274F", "versionEndExcluding": "5.8.5", "versionStartIncluding": "5.3.2"}], "operator": "OR"}]}], "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb"}