CVE-2026-25224
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
03/02/2026
Last modified:
03/02/2026
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.
Impact
Base Score 3.x
3.70
Severity 3.x
LOW