CVE-2026-25223

{"id": "CVE-2026-25223", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "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": "2026-02-03T22:16:31.130", "references": [{"url": "https://fastify.dev/docs/latest/Reference/Validation-and-Serialization", "tags": ["Product", "Technical Description"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/content-type-parser.js#L125", "tags": ["Product"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/validation.js#L272", "tags": ["Product"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fastify/fastify/commit/32d7b6add39ddf082d92579a58bea7018c5ac821", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fastify/fastify/security/advisories/GHSA-jx2c-rxcm-jvmq", "tags": ["Vendor Advisory", "Mitigation"], "source": "security-advisories@github.com"}, {"url": "https://hackerone.com/reports/3464114", "tags": ["Permissions Required"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-436"}]}], "descriptions": [{"lang": "en", "value": "Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.2, a validation bypass vulnerability exists in Fastify where request body validation schemas specified by Content-Type can be completely circumvented. By appending a tab character (\\t) followed by arbitrary content to the Content-Type header, attackers can bypass body validation while the server still processes the body as the original content type. This issue has been patched in version 5.7.2."}], "lastModified": "2026-02-10T20:05:15.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "51FAFCEB-4FBC-4777-BC6D-91713CA5828A", "versionEndExcluding": "5.7.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}