Authorization Flaw in GitLab EE Affects Multiple Versions
CVE-2026-18433

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
12 August 2026

What is CVE-2026-18433?

An issue has been identified in GitLab EE where incorrect authorization checks in a GraphQL query may enable an authenticated user to access policy configuration data belonging to a namespace for which they lack proper authorization. This flaw impacts all versions from 19.1 prior to 19.1.4 and 19.2 prior to 19.2.2, potentially exposing sensitive configuration information. GitLab has issued a remediation to address this vulnerability, reinforcing the importance of strict authorization controls.

Affected Version(s)

GitLab 19.1 < 19.1.4

GitLab 19.2 < 19.2.2

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/607556
https://hackerone.com/reports/3776182
technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gi...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [anshuman_bh](https://hackerone.com/anshuman_bh) for reporting this vulnerability through our HackerOne bug bounty program
.