zwan_cal_jan1 (RubyGems) · Malicious Code
Affects zwan_cal_jan1Source GCVE Database
Malicious package : remove zwan_cal_jan1 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-2026-9837
What to do
Remove zwan_cal_jan1 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 |
|---|---|---|
RubyGemszwan_cal_jan1pkg:gem/zwan_cal_jan1Other threats | Affected
| Fixed in– |
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Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (bc871f9516f8d80d9f4a8b676f24cfff29f9295ad0c1554d396986d72bddccaf) --- Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwan_cal_jan1/MAL-2026-9837.json))