CVE-2025-14103: 
GitLab vulnerability analysis and mitigation

CVE-2025-14103 is a Missing Authorization vulnerability (CWE-862) in GitLab CE/EE, classified as an "Access Control issue in CI job mutation." It allows an unauthorized user with Developer-role permissions to set pipeline variables for manually triggered jobs under certain conditions. The vulnerability affects all GitLab CE/EE versions from 17.7 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1. It was disclosed and patched on February 25, 2026, with a CVSS v3.1 base score of 4.3 (Medium) (GitLab Patch Release, Red Hat CVE).

The root cause is a missing authorization check (CWE-862) in GitLab's CI job mutation logic, specifically in the handling of pipeline variables for manually triggered jobs. A user with Developer-role permissions — who would not normally be authorized to set these variables — can bypass the intended access control under certain conditions, allowing them to inject arbitrary variable values into CI/CD pipeline executions. The vulnerability was reported through HackerOne (report #3448317) by researcher "go7f0" and is tracked internally at GitLab issue #583053. No public proof-of-concept exploit code has been identified (GitLab Patch Release, Red Hat CVE).

Successful exploitation allows a Developer-role user to manipulate pipeline variables in manually triggered CI/CD jobs, potentially injecting unauthorized values into build, test, or deployment pipelines. This could lead to unauthorized code execution within pipeline contexts, exposure of sensitive credentials or secrets passed as pipeline variables, or modification of deployment parameters without proper authorization. The impact is limited to integrity (no confidentiality or availability impact per CVSS), but in environments where CI/CD pipelines handle sensitive operations or secrets, the practical risk may be elevated (GitLab Patch Release, Red Hat CVE).

GitLab has released patched versions addressing this vulnerability: upgrade to 18.7.5 (for instances running 17.7.0–18.7.4), 18.8.5 (for 18.8.0–18.8.4), or 18.9.1 (for 18.9.0). GitLab.com is already running the patched version; GitLab Dedicated customers do not need to take action. As interim measures, administrators should review and audit Developer-role permissions, inspect pipeline variable configurations for unauthorized modifications, and monitor CI/CD pipeline execution logs for suspicious variable changes (GitLab Patch Release).