zwcalx4 (RubyGems) · Malicious Code
Affects zwcalx4Source GCVE Database
Malicious package : remove zwcalx4 and rotate any secrets on hosts that installed it.
Data as of 26 Oct 2026, 16:06 UTC
Malicious package
Published to RubyGems · OSV MAL-2026-9847
What to do
Remove zwcalx4 from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
RubyGemszwcalx4pkg:gem/zwcalx4Other threats | Affected
| Fixed in– |
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Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (6154ac571cd357b71a454f97ab5914e4dc9e5d33afca26a6dd32b6d50dcfa64a) --- Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwcalx4/MAL-2026-9847.json))