CVE-2026-1747 in Enterprise Edition
Summary
by MITRE • 02/25/2026
GitLab has remediated an issue in GitLab EE affecting all versions from 17.11 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that, under certain conditions, could have allowed Developer-role users with insufficient privileges to make unauthorized modifications to protected Conan packages.
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Analysis
by VulDB Data Team • 03/03/2026
This vulnerability resides within GitLab Enterprise Edition's access control mechanisms, specifically targeting the management of Conan package repositories. The flaw represents a privilege escalation issue where users assigned the Developer role can exploit insufficient authorization checks to modify protected Conan packages that should only be accessible to users with higher privileges. The vulnerability affects multiple version ranges including 17.11 through 18.7.4, 18.8 through 18.8.4, and 18.9 through 18.9.0, indicating a prolonged period of exposure across the software lifecycle. This represents a significant security gap in the package management system where the principle of least privilege is violated, allowing lower-privilege users to potentially manipulate critical software artifacts.
The technical root cause stems from inadequate access control validation within the Conan package repository management functionality. When Developer-role users attempt to perform operations on protected Conan packages, the system fails to properly verify whether the user possesses sufficient permissions to execute the requested modifications. This oversight creates a scenario where users can bypass normal authorization checks and modify packages that contain sensitive or critical dependencies. The vulnerability manifests when the system processes package modification requests without adequately cross-referencing the user's actual privileges against the package's protection level, effectively allowing unauthorized changes to occur under specific operational conditions.
The operational impact of this vulnerability extends beyond simple unauthorized modifications, as it undermines the integrity of the software supply chain managed through GitLab. Developer-role users could potentially introduce malicious code, modify dependencies, or corrupt package metadata that other team members rely upon for building and deploying applications. This threat is particularly concerning in environments where Conan packages contain critical infrastructure components or security-sensitive dependencies. The vulnerability could enable attackers who have gained access to Developer accounts to escalate their privileges and compromise the entire package repository ecosystem, potentially affecting multiple downstream projects that depend on the modified packages.
Mitigation strategies should focus on implementing robust access control verification mechanisms and ensuring proper privilege enforcement for package management operations. Organizations should immediately upgrade to the patched versions 18.7.5, 18.8.5, or 18.9.1 to resolve the vulnerability. Additionally, security teams should conduct comprehensive audits of existing Conan package repositories to identify any unauthorized modifications that may have occurred during the vulnerability window. The remediation aligns with security best practices outlined in the CWE-284 access control weakness category and represents a critical component of the ATT&CK technique T1078 valid accounts for maintaining persistent access to systems. Organizations should also consider implementing additional monitoring and logging around package modification activities to detect anomalous behavior and establish more granular access controls for package repositories.