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TI-2026-39320 Aliases CVE-2026-54463GHSA-ghhp-3qvg-889p

websocket-driver: Memory exhaustion via abuse of protocol length headers

Priority LOW 37CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
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, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host 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
Yes
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-ghhp-3qvg-889p
  • 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-ghhp-3qvg-889p

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-ghhp-3qvg-889p 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-2026-54463
  2. 2026-10-03 Alias added: GHSA-ghhp-3qvg-889p

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-2026-39322 websocket-driver: Memory exhaustion in HTTP header parser CVSS 4.0MEDIUM 6.3

Sources

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