CVE-2022-39386 HIGH

CVE-2022-39386: fastify-websocket vulnerable to uncaught exception via crash on malformed packet

Vendor Fastify
Product fastify-websocket
Weakness CWE-248
Published November 8, 2022
Last update April 23, 2025

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

@fastify/websocket provides WebSocket support for Fastify. Any application using @fastify/websocket could crash if a specific, malformed packet is sent. All versions of fastify-websocket are also impacted. That module is deprecated, so it will not be patched. This has been patched in version 7.1.1 (fastify v4) and version 5.0.1 (fastify v3). There are currently no known workarounds. However, it should be possible to attach the error handler manually. The recommended path is upgrading to the patched versions.

Key dates

02Disclosure timeline

November 8, 2022 CVE published
April 23, 2025 Record updated