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CVE-2026-12436 is a high-severity mass-assignment vulnerability in GitLab Community Edition and Enterprise Edition. It affects versions 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1. The flaw is caused by improper validation of user-supplied attributes when processing pipeline schedule inputs in the Pipeline Schedule API. Under certain conditions, an authenticated user can supply attributes that are not properly constrained to the intended ownership or authorization context, allowing modification of CI/CD configuration belonging to another user. This creates a cross-scope configuration tampering condition in scheduled pipeline management.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity GitLab vulnerability that enables tampering with pipeline schedule configurations across other users' projects.
A high-severity mass-assignment vulnerability in the GitLab Pipeline Schedule API that could allow unauthorized modification of other users' CI/CD configurations and pipeline executions.
An improper validation vulnerability in GitLab CE/EE that could allow an authenticated user to modify another user's CI/CD configuration via pipeline schedule inputs.
A mass assignment vulnerability in the GitLab Pipeline Schedule API that could let an authenticated user modify another user's CI/CD configuration due to improper validation of user-supplied attributes.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.