Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab (CVE-2026-13320)
Description
A cross-site scripting (XSS) vulnerability in GitLab CE/EE allows authenticated users to execute arbitrary scripts in other users' browser sessions due to improper sanitization of user input. This affects versions from 15.7 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. The issue has been remediated in the stated 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 CE/EE versions >=15.7.0 <18.11.7, >=19.0.0 <19.0.4, and >=19.1.0 <19.1.2 contain a cross-site scripting vulnerability (CVE-2026-13320) caused by improper neutralization of user-supplied input during web page generation. Under certain conditions, an authenticated user could exploit this flaw to execute arbitrary scripts in the browser session of another user. This vulnerability has been addressed in GitLab releases 18.11.7, 19.0.4, and 19.1.2 respectively.
Potential Impact
An attacker with authenticated access could execute arbitrary JavaScript in the context of another user's browser session, potentially leading to session hijacking, unauthorized actions, or data exposure within the affected GitLab instance.
Mitigation Recommendations
A patch is available and users should upgrade to GitLab versions 18.11.7, 19.0.4, or 19.1.2 or later to remediate this vulnerability. No additional mitigation steps are indicated beyond applying the official fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-gitlab-2026-13320
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-13320"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
Threat ID: 6a54ae0068715ace438f7e99
Added to database: 07/13/2026, 09:21:04 UTC
Last enriched: 09/10/2026, 23:02:52 UTC
Last updated: 10/06/2026, 18:48:19 UTC
Views: 81
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