npm

insomnia-plugin-poc-m4gester-run @1.0.0

Vulnerability report · Last retrieved from osv.dev July 14, 2026 at 5:45 AM UTC

Malicious

OSV ID

MAL-2026-10493

Ecosystem

npm

Summary

package.json declares a postinstall lifecycle hook that runs calc.exe on the installer's machine during npm install . The main entry point exports only an empty requestHooks array, providing no actual Insomnia plugin functionality — the package's sole effect is the arbitrary command execution at install time. The name self-identifies as a proof-of-concept and mimics the Insomnia plugin naming convention with a leet-substituted variant, indicating the package exists solely to demonstrate/exploit install-time RCE. While calc.exe itself is benign, the postinstall hook establishes full arbitrary-command-execution capability against any developer installing the package on Windows.

Source: amazon-inspector (38a525aea57681df6c21035b723701fa6067f091fd81ac26bb3fcc8e2126c43e)

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