CVE-2026-82837 in GitLab
Summary
by MITRE • 09/15/2026
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1.0 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that certain conditions could have allowed an authenticated user to access sensitive credentials and tokens without transiting the expected proxy due to improper authorization checks on internal data emission endpoints.
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Analysis
by VulDB Data Team • 09/15/2026
GitLab has addressed a critical security vulnerability impacting both Community Edition (CE) and Enterprise Edition (EE) deployments across multiple version branches, specifically affecting versions prior to 19.1.8 in the 10.x through 19.1 series, before 19.2.6 in the 19.2 branch, and before 19.3.2 in the 19.3 branch. This flaw stems from improper authorization checks implemented on internal data emission endpoints within the application architecture. The core technical deficiency lies in the failure of these specific API or service interfaces to rigorously validate whether an authenticated user possesses the necessary permissions to access sensitive configuration data, leading to a breakdown in the principle of least privilege and resulting in unauthorized information disclosure.
The operational impact of this vulnerability is severe for organizations relying on GitLab for source code management and DevOps workflows. An attacker who has obtained valid authentication credentials can exploit these misconfigured endpoints to retrieve sensitive credentials, API tokens, and other confidential configuration data stored within the platform. This access bypasses expected proxy mechanisms that are typically designed to enforce additional layers of security or logging, thereby allowing direct extraction of high-value targets such as deployment keys, database passwords, or third-party integration secrets. The ability to exfiltrate these assets without triggering standard monitoring alerts significantly increases the risk of subsequent lateral movement and compromise within an organization's infrastructure.
From a classification perspective, this vulnerability aligns with CWE-269, which denotes Improper Authorization, as it involves a failure in access control logic that allows users to perform actions beyond their intended privileges. Furthermore, the exploitation technique corresponds to ATT&CK T1078, specifically Valid Accounts and potentially T1530 for Data from Cloud Storage Object if the credentials are used to access external resources. The lack of proper checks on internal endpoints creates a direct path for data exfiltration that undermines the integrity of the authentication model established by GitLab's identity providers.
To mitigate this risk, administrators must immediately upgrade their GitLab instances to patched versions corresponding to their current release track: 19.1.8 or later for older releases, 19.2.6 or later for the 19.2 branch, and 19.3.2 or later for the 19.3 branch. Until upgrades are completed, organizations should review access logs for unusual activity on internal data emission endpoints and restrict network-level access to these services where possible using firewall rules or reverse proxy configurations that enforce strict authentication policies independent of GitLab's application-layer checks. Regular auditing of user permissions and rotation of any potentially exposed credentials is also recommended to minimize the window of exposure and reduce the blast radius in case a compromise has already occurred.