Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab (CVE-2026-6896)
Description
A cross-site scripting (XSS) vulnerability was discovered in GitLab Enterprise Edition affecting multiple versions from 13.11 up to but not including 18.11.7, 19.0 up to but not including 19.0.4, and 19.1 up to but not including 19.1.2. This vulnerability could allow an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user input. The issue has been remediated in the specified fixed versions.
Affected software
pkg:bitnami/gitlabRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
GitLab EE versions >=13.11.0 <18.11.7, >=19.0.0 <19.0.4, and >=19.1.0 <19.1.2 contained an XSS vulnerability where user-supplied input was not properly neutralized during web page generation. Under certain conditions, this allowed an authenticated developer-role user to execute arbitrary scripts in the context of another user's browser session. This vulnerability has been fixed in versions 18.11.7, 19.0.4, and 19.1.2 respectively.
Potential Impact
An attacker with developer-role permissions could exploit this vulnerability to execute arbitrary JavaScript in the browser of another user, potentially leading to session hijacking, unauthorized actions, or data exposure within the affected GitLab instance. The impact is limited to authenticated users with developer permissions and does not affect unauthenticated users.
Mitigation Recommendations
A patch is available and has been released in GitLab EE versions 18.11.7, 19.0.4, and 19.1.2. Users should upgrade affected GitLab instances to these or later versions to remediate the vulnerability. No additional mitigation steps are indicated beyond applying the official fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-gitlab-2026-6896
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-6896"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
Threat ID: 6a54ae0068715ace438f7e8d
Added to database: 07/13/2026, 09:21:04 UTC
Last enriched: 09/10/2026, 23:02:16 UTC
Last updated: 10/07/2026, 18:48:22 UTC
Views: 96
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