# CVE-2026-61666: ruby-websocket-driver: websocket-driver is a WebSocket protocol handler with pluggable I/O

CVE-2026-61666 is fixed in ruby-websocket-driver on 1 platform by DEBIAN-CVE-2026-61666 (version 0.8.2-1), released August 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-61666
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 17, 2026

## Description

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.2, WebSocket::Driver.server() passes a malformed Host header to URI.parse in lib/websocket/http/request.rb without catching URI::InvalidURIError, allowing a remote client to crash a TCP-backed WebSocket server when the application does not catch the error from parse(). This issue is fixed in version 0.8.2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-websocket-driver Debian 14 | 0.8.2-1 | [DEBIAN-CVE-2026-61666](https://patchblox.com/security/data/fix/linux/debian-cve-2026-61666.md) | Aug 20, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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