CVE-2022-39386

fastify-websocket vulnerable to uncaught exception via crash on malformed packet

State: Published
Severity: 7.5 High
Published: Nov 8, 2022
Updated: Apr 23, 2025
Reserved: Sep 2, 2022

Description

@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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-248 Uncaught Exception

Affected Products

Product	Versions
fastify-websocketfastify	>= 5.0.0, < 5.0.1Affected >= 6.0.0, < 7.1.1Affected <= 4.3.0Affected

References

https://github.com/fastify/fastify-websocket/security/advisories/GHSA-4pcg-wr6c-h9cq

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