Executive brief
GitLab Enterprise Edition, a platform for software development and collaboration, has addressed a security flaw in its Environments API. This vulnerability could allow a user with standard developer permissions to modify settings for protected environments that they should not be able to change. This could lead to unauthorized configuration changes in sensitive production or staging environments, potentially bypassing established deployment safeguards.
Technical details
An improper authorization vulnerability (CWE-863) exists in the GitLab Enterprise Edition (EE) Environments API. The flaw stems from insufficient access control checks when processing API requests to modify environment configurations. An authenticated attacker with 'developer' role permissions can exploit this to bypass restrictions on 'protected environments,' allowing them to alter settings that are typically reserved for higher-privileged users (like Maintainers or Owners). This issue affects GitLab EE versions 11.3 through 18.10.3. GitLab has released patches in versions 18.8.9, 18.9.5, and 18.10.3 to address the incorrect authorization logic.
Affected products
- GitLab GitLab Enterprise Edition 11.3 to <18.8.9, 18.9 to <18.9.5, 18.10 to <18.10.3
Timeline
- 2026-04-08: patched: GitLab released versions 18.10.3, 18.9.5, and 18.8.9
- 2026-04-08: advisory: Initial advisory published by GitLab