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CVE Vulnerability Details :
CVE-2026-5173
PUBLISHED
More InfoOfficial Page
Assigner-GitLab
Assigner Org ID-ceab7361-8a18-47b1-92ba-4d7d25f6715a
View Known Exploited Vulnerability (KEV) details
Published At-08 Apr, 2026 | 22:25
Updated At-09 Apr, 2026 | 13:16
Rejected At-
▼CVE Numbering Authority (CNA)
Exposed Dangerous Method or Function in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to invoke unintended server-side methods through websocket connections due to improper access control.

Affected Products
Vendor
GitLab Inc.GitLab
Product
GitLab
Repo
git://git@gitlab.com:gitlab-org/gitlab.git
CPEs
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Default Status
unaffected
Versions
Affected
  • From 16.9.6 before 18.8.9 (semver)
  • From 18.9 before 18.9.5 (semver)
  • From 18.10 before 18.10.3 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-749CWE-749: Exposed Dangerous Method or Function
Type: CWE
CWE ID: CWE-749
Description: CWE-749: Exposed Dangerous Method or Function
Metrics
VersionBase scoreBase severityVector
3.18.5HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Version: 3.1
Base score: 8.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Upgrade to versions 18.8.9, 18.9.5, 18.10.3 or above.

Configurations
Workarounds
Exploits
Credits
finder
This vulnerability has been discovered internally by GitLab team member Simon Tomlinson
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://gitlab.com/gitlab-org/gitlab/-/work_items/588959
N/A
https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/
N/A
Hyperlink: https://gitlab.com/gitlab-org/gitlab/-/work_items/588959
Resource: N/A
Hyperlink: https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found