VYPR
← All malware advisories

gem · Malicious package advisory

Malware

s4-client

GHSA-wgwq-675q-4fwc

Malicious code in s4-client (RubyGems)

Details

**Severity:** Critical

**Affected versions:** `= 1.2.1.r10ab0de`

## Source: ossf-package-analysis (4b0ff124956b3356a75ab19d9e7f2bddfa64f0afa017c20f34899c963fbb6be0)
The OpenSSF Package Analysis project identified 's4-client' @ 1.2.1.r10ab0de (rubygems) as malicious.

It is considered malicious because:

- The package executes one or more commands associated with malicious behavior.

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/s4-client/MAL-2025-46963.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/s4-client/MAL-2025-46963.json
- https://github.com/advisories/GHSA-wgwq-675q-4fwc

Compromised versions (1)

  • = 1.2.1.r10ab0de

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