Authorization Flaw in GitLab Affecting Multiple Versions
CVE-2026-14552

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
13 October 2026

What is CVE-2026-14552?

An issue has been identified in GitLab CE/EE that impacted versions from 17.0 to 19.2.8, 19.3.0 to 19.3.5, and 19.4.0 to 19.4.2. This vulnerability allows authenticated users with Guest access to potentially read confidential epic content that is supposed to be restricted via external authorization. The flaw arises from inadequate checks in the authorization mechanism, underscoring the necessity for robust validation to prevent unauthorized access to sensitive information.

Affected Version(s)

GitLab 17.0 < 19.2.8

GitLab 19.3 < 19.3.5

GitLab 19.4 < 19.4.2

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/604841
https://hackerone.com/reports/3809364
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 [3nvz](https://hackerone.com/3nvz) for reporting this vulnerability through our HackerOne bug bounty program
.