MalwarePublished 7 Jul 2026Updated 24 Sep 2026

zwcalx1 (RubyGems) · Malicious Code

Affects zwcalx1Source GCVE Database

Malicious package : remove zwcalx1 and rotate any secrets on hosts that installed it.

Data as of 26 Oct 2026, 16:06 UTC

Classification

Malicious package

Published to RubyGems · OSV MAL-2026-9840

What to do

Remove zwcalx1 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
RubyGemszwcalx1`pkg:gem/zwcalx1`Other threats	Affected =0.0.484	Fixed in–

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Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (53ea85b37f1e870d25a2047b9594c877305421d76ba5747436886db16b493930) --- Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwcalx1/MAL-2026-9840.json))

Impact

Use of the 'zwcalx1' package version 0.0.484 may introduce malicious code into dependent systems, potentially compromising system integrity or security. However, no specific impact details or exploitation reports are available.

Defensive guidance

Users should remove or replace this package if present in their environments. Monitor vendor or security advisories for any updates or official remediation.

Summary

The 'zwcalx1' RubyGems package at version 0.0.484 is recognized as a malicious package by the OpenSSF and GHSA-malware sources. The package contains malicious code, but no further technical details or exploit mechanisms are described in the available data.

References

Community reviews

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What to do

Affected software

Description

AI analysisMachine-generated, updated 18 Jul 2026, 16:43 UTC

Technical details

References

Community reviews