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npm · Malicious package advisory

Malware

altair-helios-start-sass-loader

GHSA-4x6m-q7j3-fj4x

Malicious code in altair-helios-start-sass-loader (npm)

Details

**Severity:** Critical

**Affected versions:** `> 0`

The package altair-helios-start-sass-loader was found to contain malicious code.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/ca35a319f3c5255ac2d7f28cf58023d75de17a35/osv/malicious/npm/altair-helios-start-sass-loader/MAL-2025-14404.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/ca35a319f3c5255ac2d7f28cf58023d75de17a35/osv/malicious/npm/altair-helios-start-sass-loader/MAL-2025-14404.json
- https://github.com/advisories/GHSA-4x6m-q7j3-fj4x

Compromised versions (1)

  • > 0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.