Vulnerability · Published Jul 17, 2026 · Assigned by GitHub_M
CVE-2026-54490websocket-driver: Resource limit bypass via message compression
Medium 6.3
In plain English
A medium-severity resource allocation without limits in websocket-driver-node from faye. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-websocket-driver | no fix listed | DEBIAN-CVE-2026-54490 |
| Debian:13 | node-websocket-driver | no fix listed | DEBIAN-CVE-2026-54490 |
| Debian:14 | node-websocket-driver | 0.7.5+~cs0.6.14-1 | DEBIAN-CVE-2026-54490 |
| Ubuntu:22.04:LTS | node-websocket-driver | no fix listed | UBUNTU-CVE-2026-54490 |
| Ubuntu:24.04:LTS | node-websocket-driver | no fix listed | UBUNTU-CVE-2026-54490 |
| Ubuntu:26.04:LTS | node-websocket-driver | no fix listed | UBUNTU-CVE-2026-54490 |
| Ubuntu:26.10 | node-websocket-driver | no fix listed | UBUNTU-CVE-2026-54490 |
| npm | websocket-driver | 0.7.5 | GHSA-mp7j-qc5w-4988 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| faye | websocket-driver-node | < 0.7.5 |
Weakness: CWE-770 · 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