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CVE-2026-25224

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 ve
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7f2f6de142b37f10019dd33d68c37fd7ba970547edeb843652f8d4943bc5d9d8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"fastify","vendor":"fastify","versions":[{"status":"affected","version":"< 5.7.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:528c48d571174e59fd7f5b70ef8ea7111854a2f65ac8bb57b4ecafdaec708269 · sha256:3157aa7a9bc6eba6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:528c48d571174e59fd7f5b70ef8ea7111854a2f65ac8bb57b4ecafdaec708269 · sha256:3157aa7a9bc6eba6… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:528c48d571174e59fd7f5b70ef8ea7111854a2f65ac8bb57b4ecafdaec708269 · sha256:3157aa7a9bc6eba6… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37","tags":["x_refsource_MISC"],"url":"https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:528c48d571174e59fd7f5b70ef8ea7111854a2f65ac8bb57b4ecafdaec708269 · sha256:3157aa7a9bc6eba6… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:528c48d571174e59fd7f5b70ef8ea7111854a2f65ac8bb57b4ecafdaec708269 · sha256:3157aa7a9bc6eba6… · /containers/cna/references/0
{"name":"https://hackerone.com/reports/3524779","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3524779"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:528c48d571174e59fd7f5b70ef8ea7111854a2f65ac8bb57b4ecafdaec708269 · sha256:3157aa7a9bc6eba6… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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