
GitLab Email Token Flaw Enables Supply Chain Attacks Through CI/CD Pipeline Compromise
In September 2026, Aikido Security disclosed a critical vulnerability in GitLab's email-based issue creation feature that allows attackers to impersonate users and execute unauthorized code commits. The flaw stems from GitLab's private email addresses for filing issues, which contain non-expiring tokens that can be exploited by anyone who obtains them. Attackers can use these leaked addresses to commit code patches to any branch the user has access to, including main branches, and trigger CI/CD jobs that execute with the victim's permissions. The attack bypasses IP restrictions and two-factor authentication, potentially compromising entire development pipelines and supply chains. This incident highlights the growing sophistication of supply chain attacks targeting developer infrastructure and CI/CD environments. As organizations increasingly rely on automated development workflows and DevOps practices, vulnerabilities in platforms like GitLab pose significant risks to software integrity and organizational security posture.
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