GitLab JavaScript XSS via crafted URL (v14.019.2.1)
CVE-2026-3093 Published on July 29, 2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.
Vulnerability Analysis
CVE-2026-3093 can be exploited with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-3093. The potential impact of an exploit of this vulnerability is considered to have a small 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-2026-3093 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-3093
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Affected Versions
GitLab:- Version 14.0 and below 19.0.5 is affected.
- Version 19.1 and below 19.1.3 is affected.
- Version 19.2 and below 19.2.1 is affected.