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gem · Malicious package advisory

Malware

zwcalx8

GHSA-9m99-w3q8-2cqw

Malicious code in zwcalx8 (RubyGems)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.493`

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwcalx8/MAL-2026-9851.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwcalx8/MAL-2026-9851.json
- https://github.com/advisories/GHSA-9m99-w3q8-2cqw

Compromised versions (1)

  • = 0.0.493

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