CVE-2026-18252
High
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.
SeverityHigh
CVSS7.3
Exploit probability—
Product
Gitlab
PublishedAug 26, 2026
First seenAug 26, 2026
Weakness typeCWE-829CWE-829
How to fix
Update
- gitlab gitlab19.1.7, 19.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 18.9.0 ≤ v < 19.1.7, 19.2.0 ≤ v < 19.2.5, 19.3.0 | 19.1.7, 19.2.5 |
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