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npm · Malicious package advisory

Malware

horizon_arlxn_4xc4j_quasar

GHSA-rc98-qjh4-688f

Malicious code in horizon_arlxn_4xc4j_quasar (npm)

Details

**Severity:** Critical

**Affected versions:** `> 0`

The package horizon_arlxn_4xc4j_quasar 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/05b419acdcdd6e02782971da765f32a22a1aed8e/osv/malicious/npm/horizon_arlxn_4xc4j_quasar/MAL-2025-22647.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/05b419acdcdd6e02782971da765f32a22a1aed8e/osv/malicious/npm/horizon_arlxn_4xc4j_quasar/MAL-2025-22647.json
- https://github.com/advisories/GHSA-rc98-qjh4-688f

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.