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CVE-2026-25224

3.7 · LOW

Fastify is a fast and low overhead web framework, for Node.js.

Published Feb 3, 2026CWE-770EPSS 0.55%

Overview

CVE-2026-25224 is a low-severity vulnerability. It was published on February 3, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37GitHubgithub.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77cRefhackerone.com/reports/3524779

How CyberStrike helps

Frequently asked questions

What is CVE-2026-25224?

CVE-2026-25224 is a low-severity vulnerability. It was published on February 3, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

How severe is CVE-2026-25224?

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-25224?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-25224?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-25224 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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