GitLab Markdown JSON Table CSRF in CE/EE before 19.3.2
CVE-2026-78252 Published on September 16, 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 15.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that, under certain conditions, an authenticated user could have induced a targeted user to perform unintended state-changing HTTP requests due to improper sanitization of user-controlled data in the Markdown JSON table renderer.
Vulnerability Analysis
CVE-2026-78252 is exploitable with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and a small 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-2026-78252 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-78252
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Affected Versions
GitLab:- Version 15.3 and below 19.1.8 is affected.
- Version 19.2 and below 19.2.6 is affected.
- Version 19.3 and below 19.3.2 is affected.