CVE-2026-18252 PUBLISHED

Inclusion of Functionality from Untrusted Control Sphere in GitLab

Assigner: GitLab
Reserved: 29.07.2026 Published: 26.08.2026 Updated: 26.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS Score: 7.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	GitLab
Product	GitLab
Versions	Default: unaffected affected from 18.9 to 19.1.7 (excl.) affected from 19.2 to 19.2.5 (excl.) affected from 19.3 to 19.3.1 (excl.)

Solutions

Upgrade to versions 19.1.7, 19.2.5, 19.3.1 or above.

Credits

Thanks [thwin_htet](https://hackerone.com/thwin_htet) for reporting this vulnerability through our HackerOne bug bounty program finder

References

Problem Types

CWE-829: Inclusion of Functionality from Untrusted Control Sphere CWE