{"schemaVersion":3,"id":"CVE-2026-25224","aliases":["GHSA-mrq3-vjjr-p77c"],"status":"published","duplicateOf":null,"title":null,"description":"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’s 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.","dates":{"published":"2026-02-03T21:21:35.437Z","modified":"2026-02-04T16:20:32.845Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":3.7,"severity":"low","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":5.6,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00554,"percentile":0.45144,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.04699999999999999,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00507},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00554,"percentile":0.45144}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00507,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00518,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00554,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00554,"percentile":0.45144}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/770.html"}],"affected":[{"vendor":"fastify","product":"fastify","name":"fastify","label":"fastify","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 5.7.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.7.3","eol":null,"hubHref":"/vendor/fastify/fastify"},{"vendor":"Npm","product":"fastify","name":"fastify","label":"fastify","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/fastify","purlType":"npm","versions":[{"text":"< 5.7.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.7.3","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c","label":"github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Vendor Advisory"]},{"url":"https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37","label":"github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37","hostname":"github.com","tags":["X Refsource MISC","WEB","Patch"]},{"url":"https://hackerone.com/reports/3524779","label":"hackerone.com/reports/3524779","hostname":"hackerone.com","tags":["X Refsource MISC","WEB","Permissions Required"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25224","label":"nvd.nist.gov/vuln/detail/CVE-2026-25224","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/fastify/fastify","label":"github.com/fastify/fastify","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-02-03T21:21:35.437Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-04T16:20:32.845Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":15,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T00:07:23.263Z","stale":false,"partial":false}}