CVE-2026-54465CWE-770denial-of-service

CVE-2026-54465

High · published July 18, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
41.1
In the wild
Unconfirmed
What it is

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, when websocket-driver is used to implement a WebSocket server on top of a TCP server using WebSocket::Driver.server() or to complement a WebSocket client, 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. This issue is fixed in version 0.8.1.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00488 · 41.1th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-18T00:17Z
Affected products (1)
ProductVersionsFixed in
faye/websocket-driver< 0.8.10.8.1
References (2)
https://github.com/faye/websocket-driver-ruby/commit/17b569f232896e71d458404ccf4854f80e987710 · [email protected]https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-8j3g-f24p-4mpw · [email protected]
EPSS history
Timeline
  • 17 JUL 20:06Z
    websocket-driver: Memory exhaustion in HTTP header parser
    cvelistv5