Authentication Bypass in GitLab EE Affecting Multiple Versions
CVE-2026-5296

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
27 May 2026

What is CVE-2026-5296?

GitLab has addressed a vulnerability within GitLab EE that allows authenticated users with developer-role permissions to bypass restrictions involving foundational flows under specific conditions. This issue impacts all versions prior to GitLab EE 18.10.7, 18.11.4, and 19.0.1 when foundational flows are enabled at the group level. The vulnerability underscores the necessity for users to update their systems to maintain security integrity and avoid potential exploitation.

Affected Version(s)

GitLab 18.7 < 18.10.7

GitLab 18.11 < 18.11.4

GitLab 19.0 < 19.0.1

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/595423
https://hackerone.com/reports/3626303
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/05/27/patch-releas...

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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