CVE-2026-61666
High
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.
SeverityHigh
CVSS8.9
Exploit probability—
ProductWebsocket-driver
PublishedAug 17, 2026
First seenAug 17, 2026
Weakness typeCWE-248CWE-248
How to fix
Update
- websocket-driver0.8.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| websocket-driverRubyGems | v < 0.8.2 | 0.8.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.