Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that, in customizable analytics dashboards, could have allowed an authenticated user to execute arbitrary JavaScript in the context of other users' browsers due to improper input sanitization.
AnalysisAI
Stored cross-site scripting (XSS) in GitLab EE customizable analytics dashboards allows authenticated users to execute arbitrary JavaScript in other users' browsers due to improper input sanitization. Affected versions include 18.2-18.8.8, 18.9-18.9.4, and 18.10-18.10.2. An attacker with valid GitLab credentials can craft malicious dashboard configurations that execute when other users view the dashboard, potentially stealing session tokens, modifying visible data, or performing actions on behalf of the victim. No public exploit code or active exploitation in the wild has been confirmed; patches are available.
Technical ContextAI
The vulnerability is a stored cross-site scripting (CWE-79) flaw in GitLab EE's customizable analytics dashboard feature. The underlying issue stems from insufficient input sanitization when processing user-supplied data for dashboard configurations. Unlike reflected XSS, stored XSS persists in the application's database and executes whenever any user accesses the affected dashboard, making it a high-impact vector for lateral privilege escalation or mass compromise within a GitLab instance. The analytics dashboard likely uses JavaScript templating or dynamic HTML generation to render user-customized content, but fails to properly escape or sanitize JavaScript context data before rendering it to other users' browsers.
RemediationAI
Upgrade GitLab EE to version 18.8.9 or later, 18.9.5 or later, or 18.10.3 or later, depending on your deployed branch. Vendor-released patch is confirmed in the 18.10.3 release (and corresponding releases for 18.8 and 18.9 branches). Until upgrade is possible, restrict access to customizable analytics dashboards to trusted users only via GitLab's role-based access control, and audit existing dashboards for suspicious configurations. Refer to the official GitLab patch release at https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ for upgrade instructions.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-20800
GHSA-26q6-hm4f-j23h