7.5

CVE-2026-54465: faye websocket-driver

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-54465DEBIAN-CVE-2026-54465CGA-2wmj-594h-4vhw
Published 17-07-2026Last modified 20-07-2026
Open JSON

Vulnerability summary

CVE-2026-54465 is a high (CVSS 7.5) vulnerability in faye websocket-driver. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.49%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-46J3-W5FW-5PW3

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 0.8.1, when websocket-driver is used to implement a WebSocket server on top of a TCP server using WebSocket::Driver.server() or to complement a WebSocket client, a peer can make a single connection consume an unbounded amount of memory by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving process running out of memory. This issue is fixed in version 0.8.1.

CVSS metrics

8 scores · 6 sources · 2 versions

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.14 pp

From 0.34% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.49%

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

Chainguard26 products
  • commercial-gitlab-rails-ee-19.1All versions (No fix recorded) | < 19.1.9-r0
  • commercial-gitlab-rails-ee-19.2< 19.2.6-r0
  • commercial-gitlab-rails-ee-fips-19.1All versions (No fix recorded) | < 19.1.9-r0
  • commercial-gitlab-rails-ee-fips-19.2< 19.2.6-r0
  • gitlab-rails-ce-18.1< 18.1.6-r29
Faye2 products
Debian1 product
  • ruby-websocket-driverAll versions (No fix recorded) | < 0.8.1-1
RubyGems1 product
  • websocket-driver< 0.8.1
Ubuntu1 product
  • ruby-websocket-driverAll versions (No fix recorded)

5 vendors · 31 products

References

11 links
Show all 11 references