Insufficient Scope Enforcement in GitLab CE/EE
CVE-2026-12664

6.8MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
21 October 2026

What is CVE-2026-12664?

A vulnerability exists in GitLab CE/EE that affects specific versions, allowing authenticated users with a read_api-scoped token to potentially retrieve sensitive project information, such as email addresses. This issue arises due to a lack of proper scope enforcement on a GraphQL field, enabling the creation of work items while bypassing the intended restrictions of the API token.

Affected Version(s)

GitLab 18.2 < 19.3.6

GitLab 19.4 < 19.4.3

GitLab 19.5 < 19.5.1

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/603510
https://hackerone.com/reports/3735499
technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gi...

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
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
.