GitLab EE 18.11.6/19.0.3/19.1.1: Dev role XSS via code exec
CVE-2026-10086 Published on June 25, 2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.
Vulnerability Analysis
CVE-2026-10086 is exploitable with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-10086 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-10086
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Affected Versions
GitLab:- Version 16.4 and below 18.11.6 is affected.
- Version 19.0 and below 19.0.3 is affected.
- Version 19.1 and below 19.1.1 is affected.