9.2

CVE-2026-54466: faye websocket-driver

CVSS: 9.2v4.0CriticalAnalyzed
AliasesUBUNTU-CVE-2026-54466DEBIAN-CVE-2026-54466CGA-89q6-8hv9-f6g9
Published 17-07-2026Last modified 20-07-2026
Open JSON

Vulnerability summary

CVE-2026-54466 is a critical (CVSS 9.2) vulnerability in faye websocket-driver. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.2/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.38%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:11680-1OPENSUSE-SU-2026:21448-1CGA-FJ4M-5J57-M642

Timeline

  1. 17-07-2026
    PublishedVulnerability first disclosed.
  2. 20-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

9 scores · 7 sources · 2 versions

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

+0.16 pp

From 0.22% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard21 products
  • arangodb-3.11< 3.11.14.4-r14
  • arangodb-3.12< 3.12.9.4-r12
  • argo-workflows-ui-4.0< 4.0.11-r0
  • gitlab-rails-ce-18.1< 18.1.6-r22
  • gitlab-rails-ce-18.10All versions (No fix recorded)
Faye2 products
Debian1 product
  • node-websocket-driverAll versions (No fix recorded) | < 0.7.5+~cs0.6.14-1
Npm1 product
  • websocket-driver< 0.7.5
Ubuntu1 product
  • node-websocket-driverAll versions (No fix recorded)
Wolfi1 product
  • argo-workflows-ui-4.0< 4.0.11-r0

6 vendors · 27 products

References

9 links