GitHub Advisoryadvisory · npm

GHSA-mp7j-qc5w-4988 websocket-driver: Resource limit bypass via message compression

MEDIUM Published 2026-07-15 Modified 2026-07-15 Official page ↗
Aliases
CVE-2026-54490
Ecosystem
npm
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-770
Reviewed
2026-07-15

Affected packages

• npm websocket-driver: < 0.7.5 → fixed in 0.7.5

Description

Impact If this library is used in tandem 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. This is because this limit is checked against the message frames' length headers, which give the size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage. Patches The issue has been patched in version 0.7.5, by checking the length of messages after they are processed by incoming extensions. 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-2026-54490 websocket-driver is a WebSocket protocol handler with pluggable I/O. vulnerability

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References