CVE-2026-12436

Analyzed Analyzed - Analysis Complete

Authenticated CI/CD Configuration Modification in GitLab CE/EE

Publication date: 2026-07-29

Last updated on: 2026-08-03

Assigner: GitLab Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-29

Last Modified

2026-08-03

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-12436

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab	From 19.1.0 (inc) to 19.1.3 (exc)
gitlab	gitlab	From 19.1.0 (inc) to 19.1.3 (exc)
gitlab	gitlab	19.2.0
gitlab	gitlab	19.2.0
gitlab	gitlab	From 18.0.0 (inc) to 19.0.5 (exc)
gitlab	gitlab	From 18.0.0 (inc) to 19.0.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-915	The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.

Attack-Flow Graph

Executive Summary

This vulnerability in GitLab CE/EE versions 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 allows an authenticated user to modify CI/CD configuration belonging to another user. It occurs due to improper validation of user-supplied attributes when processing pipeline schedule inputs.

Detection Guidance

This vulnerability affects GitLab versions before 19.0.5, 19.1.3, and 19.2.1. To detect it, check your GitLab version using commands like 'gitlab-rake gitlab:env:info' or 'cat /opt/gitlab/version-manifest.txt'. If your version is below the patched releases, the system is vulnerable.

Impact Analysis

An attacker with authenticated access could alter CI/CD pipelines of other users, potentially leading to unauthorized code execution, data breaches, or service disruption. This could affect project integrity and confidentiality.

Compliance Impact

This vulnerability could lead to unauthorized access or modification of sensitive data, violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations using affected GitLab versions may face compliance risks.

Mitigation Strategies

Upgrade GitLab CE/EE to version 19.0.5, 19.1.3, or 19.2.1 or later to address the vulnerability. Review CI/CD pipeline configurations for unauthorized modifications and audit user permissions.

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