CVE-2026-18433

Analyzed Analyzed - Analysis Complete

Incorrect Authorization in GitLab EE Allowing Unauthorized Policy Configuration Access

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 19.1 before 19.1.4 and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user to read policy configuration belonging to a namespace they were not authorized to access, due to incorrect authorization checks in a GraphQL query.

CVSS 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-2026-18433

EUVD

EUVD-2026-57435

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)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability in GitLab EE allows an authenticated user to read policy configurations from namespaces they are not authorized to access. It occurs due to incorrect authorization checks in a GraphQL query, affecting all versions from 19.1 before 19.1.4 and 19.2 before 19.2.2.

Detection Guidance

To detect this vulnerability, check GitLab EE versions for affected releases (19.1 before 19.1.4 and 19.2 before 19.2.2). Verify if unauthorized users can access policy configurations via GraphQL queries. Review audit logs for suspicious GraphQL requests to namespace-related endpoints.

Impact Analysis

An attacker with valid credentials could access sensitive policy configurations they should not be able to see. This may lead to unauthorized information disclosure about access controls, security policies, or other restricted data within the affected namespace.

Compliance Impact

This vulnerability could violate compliance requirements by exposing sensitive data to unauthorized users. GDPR may require breach notification if personal data is accessed, while HIPAA could be compromised if protected health information is exposed. Organizations must assess potential data exposure risks.

Mitigation Strategies

Upgrade GitLab EE to version 19.1.4 or later if using 19.1.x, or to version 19.2.2 or later if using 19.2.x. This addresses the incorrect authorization checks in the GraphQL query that allowed unauthorized access to policy configurations.

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