AIKIDO-2026-668891
gitlab-ce is vulnerable to Incorrect Authorization
82
High Risk
This Affects:
gitlab-ceTL;DR
can_write_ref? in CreateDownstreamPipelineService applies the protected-branch check only when the target is a branch ref. A workload ref does not match that shape, so the check is skipped and a Developer can create a downstream pipeline on a protected branch. The fix rejects workload refs before that check runs.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and Developers can create downstream pipelines.
Background info
gitlab-ce is vulnerable to Incorrect Authorization in versions 18.7.0 - 19.2.7, 19.3.0 - 19.3.3 and 19.4.0 - 19.4.1.
How to fix this
Upgrade the gitlab-ce library to the patch version.
Links
docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/gitlab.com/gitlab-org/gitlab/-/work_items/606501hackerone.com/reports/3853866
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