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CVE-2026-54466

CRITICAL
9.2
CVSS 4.0
Description
websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, the frame format in draft versions of the WebSocket protocol includes a length header that allows an arbitrarily large integer to be encoded 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 make the server parse these bytes into an ever-growing integer in lib/websocket/driver/draft75.js; because JavaScript numbers are 64-bit floating point values, this number will eventually lose precision and lead to the subsequent payload being parsed incorrectly. This issue is fixed in version 0.7.5.

Metadata

CVE ID
CVE-2026-54466
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-15 15:30 UTC
Published
2026-07-17 20:53 UTC
Last updated
2026-07-17 20:53 UTC
Primary CWE
CWE-130
CWE-130: Improper Handling of Length Parameter Inconsistency
Vendor / Product
faye / websocket-driver-node
Sources
cve.org  ·  NVD

Severity & Metrics

9.2 CRITICAL CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Affected products (1)
VendorProductPlatformVersions
faye websocket-driver-node — < 0.7.5
Weakness (CWE)
CWESourceDescription
CWE-130 cna CWE-130: Improper Handling of Length Parameter Inconsistency
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.2 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
References (2)
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