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TI-2026-39336 Aliases CVE-2026-54490GHSA-mp7j-qc5w-4988

websocket-driver: Resource limit bypass via message compression

Priority LOW 34CWE-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 0.7.5, if this library is used with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size because the limit is checked against the message frames' length headers, which give the size of the compressed data, not the size after decompression in lib/websocket/driver/hybi.js. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage. This issue is fixed in version 0.7.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00445 38th percentileScored 2026-11-07
Fix Fixed websocket-driver-node (faye): 0.7.5websocket-driver (npm): 0.7.5

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-nodebefore 0.7.50.7.5Patch availableCNA
—websocket-driver (npm)before 0.7.50.7.5Patch availableGHSA-mp7j-qc5w-4988
  • websocket-driver-node Vendorfaye Affected before 0.7.5 Fixed in 0.7.5 Patch available CNA
  • websocket-driver (npm) Vendor— Affected before 0.7.5 Fixed in 0.7.5 Patch available GHSA-mp7j-qc5w-4988

Remediation

  • Fix · CNA websocket-driver-node (faye) Fixed in 0.7.5
  • Fix · GHSA-mp7j-qc5w-4988 websocket-driver (npm) Fixed in 0.7.5 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54490
  2. 2026-10-03 Alias added: GHSA-mp7j-qc5w-4988

References

Other 4

  • TI-2026-39323 websocket-driver: Message corruption via abuse of protocol length headers CVSS 4.0CRITICAL 9.2
  • TI-2020-08894 Authentication and extension bypass in Faye CVSS 3.1CRITICAL 9.8
  • TI-2026-44153 websocket-driver: Denial of service via malformed Host header CVSS 4.0HIGH 8.9
  • TI-2020-11907 Missing TLS certificate verification in Faye CVSS 3.1HIGH 8.7
  • TI-2020-11906 Missing TLS certificate verification in Faye Websocket CVSS 3.1HIGH 8.7
  • TI-2026-39320 websocket-driver: Memory exhaustion via abuse of protocol length headers CVSS 4.0MEDIUM 6.9
See all 8 →

Sources

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