MAL-2026-5194 Malicious code in yaml-javascript (npm)

Malicious package Published
Package
yaml-javascript
Registry
npm

What is MAL-2026-5194?

MAL-2026-5194 is a malicious package in yaml-javascript, published on 4 Jun 2026.

Official description

This malicious package is part the IronWorm campaign. This campaign executes a malicious binary payload during installation via a preinstall hook. The payload is a Rust-built infostealer that targets developer environments, scanning for and harvesting credentials related to cloud providers, object storage, databases, source-control, package registries, and AI developer tools. It also targets cryptocurrency wallets, specifically injecting a malicious JavaScript hook into the Exodus desktop wallet to capture passwords and recovery phrases. Furthermore, the malware exhibits worm-like behavior by stealing GitHub and NPM credentials to push malicious updates to the victim's repositories and publish trojanized packages, and it uses an eBPF-based kernel rootkit to hide its processes and network connections on Linux systems.

What should I do about MAL-2026-5194?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

Sources

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