Node websocket driver: websocket-driver is a WebSocket protocol handler with pluggable I/O. (CVE-2026-54466)
A vulnerability in node-websocket-driver prior to version 0.7.5 allows a client to send an indefinite sequence of bytes that causes the server to parse an ever-growing integer incorrectly due to JavaScript number precision limits. This leads to incorrect parsing of subsequent payload data. The issue is fixed in version 0.7.5.
AI Analysis
Technical Summary
The node-websocket-driver library, which handles the WebSocket protocol with pluggable I/O, has a vulnerability in versions before 0.7.5 related to the frame format in draft WebSocket protocol versions. The length header allows encoding an arbitrarily large integer as a sequence of bytes with the high bit set. By sending an indefinite sequence of bytes with values 0x80 or above, a client can cause the server to parse these bytes into an ever-growing integer in the draft75.js file. Because JavaScript numbers are 64-bit floating point values, this integer eventually loses precision, causing the subsequent payload to be parsed incorrectly. This vulnerability is identified as CVE-2026-54466 and is fixed in version 0.7.5.
Potential Impact
The vulnerability does not impact confidentiality or availability but can lead to incorrect parsing of WebSocket payloads, potentially allowing an attacker to manipulate or disrupt the integrity of the data processed by the server. The CVSS score is 7.5 with an impact rating of high on integrity and no impact on confidentiality or availability.
Mitigation Recommendations
Upgrade node-websocket-driver to version 0.7.5 or later, where this issue is fixed. No other mitigations are indicated or necessary.
Node websocket driver: websocket-driver is a WebSocket protocol handler with pluggable I/O. (CVE-2026-54466)
Description
A vulnerability in node-websocket-driver prior to version 0.7.5 allows a client to send an indefinite sequence of bytes that causes the server to parse an ever-growing integer incorrectly due to JavaScript number precision limits. This leads to incorrect parsing of subsequent payload data. The issue is fixed in version 0.7.5.
CVSS v3.1
Score 7.5high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The node-websocket-driver library, which handles the WebSocket protocol with pluggable I/O, has a vulnerability in versions before 0.7.5 related to the frame format in draft WebSocket protocol versions. The length header allows encoding an arbitrarily large integer as a sequence of bytes with the high bit set. By sending an indefinite sequence of bytes with values 0x80 or above, a client can cause the server to parse these bytes into an ever-growing integer in the draft75.js file. Because JavaScript numbers are 64-bit floating point values, this integer eventually loses precision, causing the subsequent payload to be parsed incorrectly. This vulnerability is identified as CVE-2026-54466 and is fixed in version 0.7.5.
Potential Impact
The vulnerability does not impact confidentiality or availability but can lead to incorrect parsing of WebSocket payloads, potentially allowing an attacker to manipulate or disrupt the integrity of the data processed by the server. The CVSS score is 7.5 with an impact rating of high on integrity and no impact on confidentiality or availability.
Mitigation Recommendations
Upgrade node-websocket-driver to version 0.7.5 or later, where this issue is fixed. No other mitigations are indicated or necessary.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xv26-6w52-cph6
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-54466"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 4.0
Threat ID: 6a58b40e68715ace43d67c9b
Added to database: 07/16/2026, 10:35:58 UTC
Last enriched: 08/08/2026, 16:59:29 UTC
Last updated: 09/01/2026, 21:10:23 UTC
Views: 134
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.