BIT-gitlab-2026-10086: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
A cross-site scripting (XSS) vulnerability exists in GitLab EE versions from 16.4 up to but not including 18.11.6, 19.0 up to but not including 19.0.3, and 19.1 up to but not including 19.1.1. This vulnerability allows an authenticated user with developer-role permissions to execute arbitrary client-side code in another user's session due to improper sanitization of user-supplied input. The issue has been remediated in the specified fixed versions.
AI Analysis
Technical Summary
GitLab EE contained an XSS vulnerability (CVE-2026-10086) affecting versions >=16.4.0 <18.11.6, >=19.0.0 <19.0.3, and >=19.1.0 <19.1.1. Under certain conditions, an authenticated user with developer permissions could inject malicious client-side code that executes in the context of another user's session. This was caused by improper neutralization of input during web page generation. The vulnerability has been fixed in versions 18.11.6, 19.0.3, and 19.1.1 respectively.
Potential Impact
An attacker with developer-role permissions could exploit this vulnerability to execute arbitrary client-side scripts in the context of other users' sessions, potentially leading to session hijacking or other client-side attacks. The impact is limited to authenticated users with developer permissions and does not affect unauthenticated users.
Mitigation Recommendations
The vulnerability has been remediated in GitLab EE versions 18.11.6, 19.0.3, and 19.1.1. Users should upgrade to these or later versions to mitigate the risk. No additional vendor advisory indicates alternative mitigations or that no action is required.
BIT-gitlab-2026-10086: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Description
A cross-site scripting (XSS) vulnerability exists in GitLab EE versions from 16.4 up to but not including 18.11.6, 19.0 up to but not including 19.0.3, and 19.1 up to but not including 19.1.1. This vulnerability allows an authenticated user with developer-role permissions to execute arbitrary client-side code in another user's session due to improper sanitization of user-supplied 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 contained an XSS vulnerability (CVE-2026-10086) affecting versions >=16.4.0 <18.11.6, >=19.0.0 <19.0.3, and >=19.1.0 <19.1.1. Under certain conditions, an authenticated user with developer permissions could inject malicious client-side code that executes in the context of another user's session. This was caused by improper neutralization of input during web page generation. The vulnerability has been fixed in versions 18.11.6, 19.0.3, and 19.1.1 respectively.
Potential Impact
An attacker with developer-role permissions could exploit this vulnerability to execute arbitrary client-side scripts in the context of other users' sessions, potentially leading to session hijacking or other client-side attacks. The impact is limited to authenticated users with developer permissions and does not affect unauthenticated users.
Mitigation Recommendations
The vulnerability has been remediated in GitLab EE versions 18.11.6, 19.0.3, and 19.1.1. Users should upgrade to these or later versions to mitigate the risk. No additional vendor advisory indicates alternative mitigations or that no action is required.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-gitlab-2026-10086
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-10086"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
- Cvss Version
- null
Threat ID: 6a42ed7427e9c79719939377
Added to database: 06/29/2026, 22:11:00 UTC
Last enriched: 06/29/2026, 22:39:55 UTC
Last updated: 06/29/2026, 23:29:29 UTC
Views: 3
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