GHSA-8j3g-f24p-4mpw
websocket-driver: Memory exhaustion in HTTP header parser
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| RubyGems | websocket-driver | < 0.8.1 | 0.8.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
If this library is used to implement a WebSocket server on top of a TCP server (rather than an HTTP server or framework) using the `WebSocket::Driver.server()` method, or, if it is used to complement a WebSocket client, then a peer can make a single connection consume an unbounded amount of memory by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving process running out of memory.
### Patches
The issue has been patched in version 0.8.1, by limiting the total size of HTTP request/response lines and headers accepted by the parser to 32 kB. All users should upgrade to this version.
### Workarounds
No known workarounds exist.
### Acknowledgements
This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-8j3g-f24p-4mpw
- https://nvd.nist.gov/vuln/detail/CVE-2026-54465
- https://github.com/faye/websocket-driver-ruby/commit/17b569f232896e71d458404ccf4854f80e987710
- https://github.com/faye/websocket-driver-ruby
- https://github.com/faye/websocket-driver-ruby/releases/tag/0.8.1
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-driver/CVE-2026-54465.yml
- https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54465