CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2022-39386
High (7.5) in fastify websocket. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in @fastify/websocket 5.0.1, 7.1.1.
@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.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
- CWE
- CWE-248
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fastify:websocket
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4pcg-wr6c-h9cq | npm | @fastify/websocket | >=5.0.0 <5.0.1 | 5.0.1 |
| GHSA-4pcg-wr6c-h9cq | npm | @fastify/websocket | >=6.0.0 <7.1.1 | 7.1.1 |
| GHSA-4pcg-wr6c-h9cq | npm | fastify-websocket | <=4.3.0 | no fix published |