What’s Vulnerable › Vulnerabilities

CVE-2026-12436: Improperly Controlled Modification of Dynamically-Determined Object Attributes in GitLab

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-29 · updated 2026-08-03
• Weakness: CWE-915

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to modify CI/CD configuration belonging to another user due to improper validation of user-supplied attributes when processing pipeline schedule inputs.

Affected products

• GitLab: from 18.0.0 before 19.0.5; from 19.1.0 before 19.1.3; 19.2.0 — fixed in 19.0.5, 19.1.3

How to fix

Upgrade to a fixed version: GitLab 19.0.5, 19.1.3. Check the vendor advisory for mitigations.

References

• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/603223
• https://hackerone.com/reports/3800511

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