Authorization Flaw in GitLab CE/EE Affects Container Registry Management
CVE-2026-1338

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
14 May 2026

What is CVE-2026-1338?

GitLab has addressed a significant issue in its CE/EE versions that allowed authenticated users with developer-role permissions to delete protected container registry tags. This vulnerability arose from insufficient authorization checks, potentially leading to unauthorized deletions within the container registry, affecting the integrity and availability of essential assets. The issue impacts multiple versions of GitLab, emphasizing the need for users to upgrade to patched versions to ensure robust security.

Affected Version(s)

GitLab 17.10 < 18.9.7

GitLab 18.10 < 18.10.6

GitLab 18.11 < 18.11.3

References

https://hackerone.com/reports/3480620
technical-descriptionexploitpermissions-required
https://gitlab.com/gitlab-org/gitlab/-/work_items/587326
https://about.gitlab.com/releases/2026/05/13/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 [go7f0](https://hackerone.com/go7f0) for reporting this vulnerability through our HackerOne bug bounty program
.