Access Control Flaw in GitLab Affecting Multiple Versions
CVE-2026-5377

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
22 April 2026

What is CVE-2026-5377?

An issue has been identified in GitLab CE/EE versions prior to 18.11.1 that could potentially allow authenticated users to view titles of private or confidential issues within public projects. This vulnerability stems from improper access controls during the issue description rendering process, making it critical for users to update to the latest version to mitigate potential data exposure risks. GitLab has since released a patch to address this issue, emphasizing the importance of maintaining up-to-date software.

Affected Version(s)

GitLab 18.11 < 18.11.1

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/595553
https://hackerone.com/reports/3640688
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/04/22/patch-releas...

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