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 version 5.7.3.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37	Patch
https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c	Vendor Advisory
https://hackerone.com/reports/3524779	Permissions Required

Configurations

Configuration 1 (hide)

cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-02-03 22:16

Updated : 2026-02-10 19:24

NVD link : CVE-2026-25224

Mitre link : CVE-2026-25224

CVE.ORG link : CVE-2026-25224

JSON object : View

Products Affected

fastify

fastify

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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