MalwarePublished 7 Jul 2026Updated 24 Sep 2026

zwkopt12 (RubyGems) · Malicious Code

Affects zwkopt12Source GCVE Database

Malicious package : remove zwkopt12 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-2026-9875

What to do

Remove zwkopt12 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
RubyGemszwkopt12`pkg:gem/zwkopt12`Other threats	Affected =0.0.3502	Fixed in–

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Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (862861723db31c37c8a74ddfdc066fc37716adce1ae275f2a74b5320dafeec7b) --- Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwkopt12/MAL-2026-9875.json))

Impact

Use of the affected package version 0.0.3502 may result in execution of malicious code, potentially compromising systems that install or run this package. Since this is a malicious package, the impact is the presence of harmful code rather than a vulnerability that can be exploited remotely or locally. No known active exploitation has been reported.

Defensive guidance

Avoid using the affected version 0.0.3502 of the 'zwkopt12' RubyGems package. Monitor official RubyGems sources and the OpenSSF malicious packages repository for updates or safer alternatives.

Summary

The RubyGems package 'zwkopt12' at version 0.0.3502 is identified as containing malicious code according to the OpenSSF malicious packages database. This classification indicates that the package itself is intentionally harmful or compromised, rather than having a vulnerability that can be exploited. No further technical details or exploitation methods are provided in the source data.

References

github.com/advisories/GHSA-x64m-pg6h-jm26 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 18 Jul 2026, 16:39 UTC

Technical details

References

Community reviews