Improper Validation Vulnerability in GitLab CE/EE Affects User CI/CD Configurations
CVE-2026-12436

8.4HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
29 July 2026

What is CVE-2026-12436?

A vulnerability exists in GitLab CE/EE that could allow an authenticated user to manipulate CI/CD configurations belonging to other users. This issue arises from improper validation of user-supplied attributes during the processing of pipeline schedule inputs. The flaw affects multiple versions of the software, and it is critical for users to apply relevant patches to prevent unauthorized access to sensitive configurations.

Affected Version(s)

GitLab 18.0 < 19.0.5

GitLab 19.1 < 19.1.3

GitLab 19.2 < 19.2.1

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/603223
https://hackerone.com/reports/3800511
technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gi...

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [a0xnirudh](https://hackerone.com/a0xnirudh) for reporting this vulnerability through our HackerOne bug bounty program
.