CVE-2026-79708 in GitLab
Summary
by MITRE • 09/16/2026
GitLab has remediated an issue in GitLab EE affecting all versions from 19.0 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that, under certain conditions could have allowed an authenticated user with developer permissions to execute a policy test pipeline on projects within their group and access protected CI/CD variables restricted to higher-privileged roles, due to insufficient scope validation.
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Analysis
by VulDB Data Team • 09/16/2026
GitLab Enterprise Edition versions prior to 19.0.8, 19.2.6, and 19.3.2 contained a critical authorization flaw related to the handling of CI/CD pipeline execution policies. This vulnerability stems from insufficient scope validation within the application's backend logic when processing requests for policy test pipelines. The issue specifically impacts authenticated users who possess developer-level permissions on projects located within their respective groups. Under normal operational circumstances, developers are granted significant access to code and repository management but are explicitly restricted from accessing sensitive configuration data that could compromise the integrity of the deployment pipeline or expose secrets used in production environments.
The core technical flaw lies in how GitLab validates user privileges when initiating a policy test run. The system failed to adequately verify whether the requesting user had the necessary elevated permissions required for specific high-security operations, such as accessing protected CI/CD variables. Protected variables are designed to store sensitive information like API keys, passwords, or encryption certificates that should only be accessible by maintainers, owners, or automated pipeline runners with explicit trust levels. By bypassing this validation check, an attacker could trigger a policy test execution context where the application erroneously exposed these protected environment variables in the output logs or response payloads of the pipeline run.
The operational impact of this vulnerability is severe for organizations relying on GitLab for their continuous integration and deployment workflows. An authenticated developer with malicious intent or whose credentials have been compromised can exploit this flaw to exfiltrate sensitive secrets stored as protected CI/CD variables. This exposure allows the attacker to gain unauthorized access to external services, databases, or cloud infrastructure that rely on these credentials for authentication. Furthermore, because the vulnerability involves executing a pipeline action, it also represents an abuse of legitimate functionality, potentially leading to resource exhaustion if exploited at scale through automated scripts targeting multiple projects within a group.
From a classification perspective, this issue aligns with CWE-269 Improper Privilege Management and CWE-732 Incorrect Permission Assignment for Critical Resource. The failure to enforce role-based access control boundaries during the execution of policy tests demonstrates a lapse in ensuring that users only perform actions appropriate to their assigned security clearance level. In terms of offensive cybersecurity frameworks, this vulnerability facilitates techniques associated with ATT&CK T1508 Exploitation of Software Weaknesses and potentially contributes to credential harvesting if used in conjunction with other exploitation methods. The ability to access protected variables effectively grants the attacker a foothold that can be leveraged for lateral movement within the organization's infrastructure or further privilege escalation attacks against downstream systems.
Mitigation requires immediate upgrading to GitLab Enterprise Edition version 19.0.8, 19.2.6, or 19.3.2 and later, depending on the specific branch in use. These releases contain patches that enforce stricter scope validation checks before allowing policy test pipelines to execute with elevated context. Organizations should also audit their CI/CD variable configurations to ensure that sensitive data is not stored as protected variables unless absolutely necessary for automated processes. Implementing additional monitoring around pipeline execution logs can help detect any anomalous access patterns indicative of exploitation attempts prior to patch deployment. Regular security assessments and adherence to the principle of least privilege are essential to prevent similar authorization bypasses in future software updates.