Researchers have uncovered a software supply chain attack affecting 144 npm packages linked to the Mastra namespace, which is used for building AI applications. The attack, identified by JFrog, SafeDep, Socket, and StepSecurity, involved the hijacking of a single npm account belonging to a user named 'ehindero', who then published malicious versions of these packages. This incident raises significant concerns for developers who rely on the Mastra framework, as it could lead to the introduction of vulnerabilities in their applications. Users of these compromised packages are urged to check their dependencies and update to secure versions to avoid potential risks. This event serves as a reminder of the importance of securing contributor accounts in open-source ecosystems.