Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.7 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2, that could have allowed a blocked user to access sensitive information by establishing GraphQL subscriptions through WebSocket connections.
References (3)
Core 3
Core References
Release Notes, Vendor Advisory
https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/
Broken Link issue-tracking
permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/526360
Permissions Required technical-description
exploit
permissions-required
https://hackerone.com/reports/3049150
Scores
CVSS v3
4.3
EPSS
0.0027
EPSS Percentile
19.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-201
Status
published
Products (1)
gitlab/gitlab
16.7.0 - 18.3.6 (2 CPE variants)
Published
Nov 15, 2025
Tracked Since
Feb 18, 2026