CVE-2026-4879

Analyzed Analyzed - Analysis Complete

GitLab EE Missing Authorization in Merge Request API

Publication date: 2026-08-12

Last updated on: 2026-08-19

Assigner: GitLab Inc.

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 16.0 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to view external status check configuration restricted to higher-privileged roles due to missing authorization on a merge request API endpoint.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-12

Last Modified

2026-08-19

Generated

2026-09-02

AI Q&A

2026-08-13

EPSS Evaluated

2026-08-31

NVD

CVE-2026-4879

EUVD

EUVD-2026-57441

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab	From 19.1.0 (inc) to 19.1.4 (exc)
gitlab	gitlab	From 19.2.0 (inc) to 19.2.2 (exc)
gitlab	gitlab	From 16.0.0 (inc) to 19.0.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability in GitLab EE allows an authenticated user with developer-role permissions to view external status check configurations that should be restricted to higher-privileged roles. This occurs due to missing authorization on a merge request API endpoint.

Detection Guidance

This vulnerability can be detected by checking the GitLab EE version against the patched versions (19.0.6, 19.1.4, or 19.2.2). Use commands like 'gitlab-rake gitlab:version' to check the installed version. If the version is below these thresholds, the system is vulnerable.

Impact Analysis

An attacker with developer access could potentially access sensitive external status check configurations, leading to unauthorized information disclosure. This may expose internal processes or compliance-related settings.

Compliance Impact

This vulnerability could impact compliance by exposing sensitive configuration data that may include personal or protected health information. Unauthorized access to such data may violate GDPR or HIPAA requirements for data protection and access controls.

Mitigation Strategies

Upgrade GitLab EE to a patched version: 19.0.6, 19.1.4, or 19.2.2 or later to address the authorization issue in the merge request API endpoint.

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