{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-25224", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-30T14:44:47.327Z", "datePublished": "2026-02-03T21:21:35.437Z", "dateUpdated": "2026-02-03T21:21:35.437Z"}, "containers": {"cna": {"title": "Fastify Vulnerable to DoS via Unbounded Memory Allocation in sendWebStream", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c"}, {"name": "https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37", "tags": ["x_refsource_MISC"], "url": "https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37"}, {"name": "https://hackerone.com/reports/3524779", "tags": ["x_refsource_MISC"], "url": "https://hackerone.com/reports/3524779"}], "affected": [{"vendor": "fastify", "product": "fastify", "versions": [{"version": "< 5.7.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-03T21:21:35.437Z"}, "descriptions": [{"lang": "en", "value": "Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.3, a denial-of-service vulnerability in Fastify\u2019s Web Streams response handling can allow a remote client to exhaust server memory. Applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted. A slow or non-reading client can trigger unbounded buffering when backpressure is ignored, leading to process crashes or severe degradation. This issue has been patched in version 5.7.3."}], "source": {"advisory": "GHSA-mrq3-vjjr-p77c", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.3, a denial-of-service vulnerability in Fastify\u2019s Web Streams response handling can allow a remote client to exhaust server memory. Applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted. A slow or non-reading client can trigger unbounded buffering when backpressure is ignored, leading to process crashes or severe degradation. This issue has been patched in version 5.7.3."}], "id": "CVE-2026-25224", "lastModified": "2026-02-03T22:16:31.290", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-02-03T22:16:31.290", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37"}, {"source": "security-advisories@github.com", "url": "https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c"}, {"source": "security-advisories@github.com", "url": "https://hackerone.com/reports/3524779"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}