CVE-2026-25224
Fixed upstream EPSS <1%CVSS 3.7
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.
Products: fastify
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| npm | fastify | 5.7.3 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | postgres-meta | no fix |