CVE-2025-32442

Fastify is a fast and low overhead web framework, for Node.js. In versions 5.0.0 to 5.3.0 as well as version 4.29.0, applications that specify different validation strategies for different content types have a possibility to bypass validation by providing a _slightly altered_ content type such as with different casing or altered whitespacing before `;`. This was patched in v5.3.1, but the initial patch did not cover all problems. This has been fully patched in v5.3.2 and v4.29.1. A workaround involves not specifying individual content types in the schema.

• CWE-1287

• https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418Patch
• https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4Patch
• https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwcExploit, Third Party Advisory
• https://hackerone.com/reports/3087928Permissions Required

Published

Apr 18, 2025

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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