VSCode IDE Forks Expose Software Supply Chain Risks via Recommended Extensions
In late 2025, researchers at Koi Security identified a vulnerability across several AI-powered IDEs forked from Microsoft Visual Studio Code—including Cursor, Windsurf, Google Antigravity, and Trae—whereby hardcoded lists of "recommended" extensions pointed to namespaces that were unclaimed in the OpenVSX extension registry. Threat actors could exploit this by registering these namespaces and publishing malicious extensions, leveraging user trust in built-in recommendations. The risk affected any developer using these IDE forks, potentially opening the door for supply chain malware. After reporting, project maintainers began removing vulnerable recommendations and placeholder, non-functional extensions were uploaded to block exploitation. No evidence of active malicious abuse was found prior to remediation. This incident underscores the growing risk of software supply chain attacks, particularly via open-source repositories and trusted platform recommendations. As more AI-powered tools automate software development environments, attackers are increasingly targeting overlooked dependency and plugin ecosystems, forcing organizations to enhance extension and third-party controls.
Kill Chain