Authorization Bypass in GitLab CE/EE Affects Multiple Versions
CVE-2026-2104

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
8 April 2026

What is CVE-2026-2104?

GitLab has addressed a significant authorization bypass issue in its CE/EE versions which affected all instances from 18.2 up to but not including 18.8.9, 18.9 up to but not including 18.9.5, and 18.10 up to but not including 18.10.3. This vulnerability could potentially allow an authenticated user to export confidential issues assigned to other users via CSV, highlighting a serious concern regarding insufficient authorization checks within the platform.

Affected Version(s)

GitLab 18.2 < 18.8.9

GitLab 18.9 < 18.9.5

GitLab 18.10 < 18.10.3

References

https://hackerone.com/reports/3541476
technical-descriptionexploitpermissions-required
https://gitlab.com/gitlab-org/gitlab/-/work_items/589021
https://about.gitlab.com/releases/2026/04/08/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 [ahacker1](https://hackerone.com/ahacker1) for reporting this vulnerability through our HackerOne bug bounty program
.