GitHub Advisoryadvisory · RubyGems

GHSA-8j3g-f24p-4mpw websocket-driver: Memory exhaustion in HTTP header parser

MEDIUM Published 2026-07-15 Modified 2026-08-17 Official page ↗
Aliases
CVE-2026-54465
Ecosystem
RubyGems
Packages
websocket-driver
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
Weaknesses
CWE-400, CWE-770
Reviewed
2026-07-15

Affected packages

• RubyGems websocket-driver: < 0.8.1 → fixed in 0.8.1

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-54465 websocket-driver is a WebSocket protocol handler with pluggable I/O. vulnerability

Weakness · CWE (2)

  • CWE-400 Uncontrolled Resource Consumption weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References