CVE-2026-78252
High
Description
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.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Gitlab
PublishedSep 16, 2026
First seenSep 16, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- gitlab gitlab19.1.8, 19.2.6, 19.3.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 15.3.0 ≤ v < 19.1.8, 19.2.0 ≤ v < 19.2.6, 19.3.0 ≤ v < 19.3.2 | 19.1.8, 19.2.6, 19.3.2 |
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