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TI-2026-39322 Aliases CVE-2026-54465GHSA-8j3g-f24p-4mpw

websocket-driver: Memory exhaustion in HTTP header parser

Priority LOW 29CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00488 42nd percentileScored 2026-11-07
Fix Fixed websocket-driver-ruby (faye): 0.8.1websocket-driver (RubyGems): 0.8.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
fayewebsocket-driver-rubybefore 0.8.10.8.1Patch availableCNA
—websocket-driver (RubyGems)before 0.8.10.8.1Patch availableGHSA-8j3g-f24p-4mpw
  • websocket-driver-ruby Vendorfaye Affected before 0.8.1 Fixed in 0.8.1 Patch available CNA
  • websocket-driver (RubyGems) Vendor— Affected before 0.8.1 Fixed in 0.8.1 Patch available GHSA-8j3g-f24p-4mpw

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:faye:websocket-driver:*:*:*:*:*:ruby:*:*before 0.8.1Vulnerablefaye
  • cpe:2.3:a:faye:websocket-driver:*:*:*:*:*:ruby:*:* Versions before 0.8.1 Vulnerable ·faye

Remediation

  • Fix · CNA websocket-driver-ruby (faye) Fixed in 0.8.1
  • Fix · GHSA-8j3g-f24p-4mpw websocket-driver (RubyGems) Fixed in 0.8.1 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54465
  2. 2026-10-03 Alias added: GHSA-8j3g-f24p-4mpw

References

Patch 1

Advisory 2

Other 4

  • TI-2026-39323 websocket-driver: Message corruption via abuse of protocol length headers CVSS 4.0CRITICAL 9.2
  • TI-2026-39320 websocket-driver: Memory exhaustion via abuse of protocol length headers CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences