CVE-2026-15387

Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab

GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 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 influenced the execution environment of Pipeline Execution Policy enforcement jobs, due to improper handling of job dependencies.

Affected

GitLab

CVSS v3.1 GITLAB

4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS

0.21% chance of exploitation in the next 30 days, 10th percentile

Published

2026-08-26

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3754358

Security advisories

• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released
• https://gitlab.com/gitlab-org/gitlab/-/work_items/605632

References

• CVE Record
• NVD entry