On January 30, 2026, four established Open VSX extensions published by the oorzc author had malicious versions published to Open VSX that embed the GlassWorm malware loader, These extensions had previously been presented as legitimate developer utilities (some first published more than two years ago) and collectively accumulated over 22,000 Open VSX downloads prior to the malicious releases.
Just a little over two weeks after GlassWorm was declared "fully contained and closed" by the open source OpenVSX project, the self-propagating worm is once again targeting Visual Studio Code extensions, add-ons that enhance open source VS Code, providing new features, debuggers, and other tools to improve developer workflows. Researchers from Koi have discovered a new wave of infections and three more compromised extensions.