MalwarePublished 7 Jul 2026Updated 24 Sep 2026

zhcal57252b (RubyGems) · Malicious Code

Affects zhcal57252bSource GCVE Database

Malicious package : remove zhcal57252b and rotate any secrets on hosts that installed it.

Data as of 26 Oct 2026, 16:07 UTC

Classification

Malicious package

Published to RubyGems · OSV MAL-2026-9572

What to do

Remove zhcal57252b 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
RubyGemszhcal57252b`pkg:gem/zhcal57252b`Other threats	Affected =0.0.1	Fixed in–

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Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (9bf13e912d090e53251d9a50c231dd1c6c25e08446c06e53d692442525f20dce) --- Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zhcal57252b/MAL-2026-9572.json))

Impact

Using or installing the 'zhcal57252b' package version 0.0.1 may expose users to malicious code execution or compromise, as the package is flagged as malicious. There are no reported exploits in the wild, but the presence of malicious code poses a direct security risk if the package is used.

Defensive guidance

Avoid using or installing the 'zhcal57252b' package version 0.0.1. Since this is a malicious package rather than a vulnerability with a patch, remediation involves removing or not including this package in your environment. Verify dependencies and sources before installing RubyGems packages.

Summary

The package 'zhcal57252b' version 0.0.1 in the RubyGems ecosystem has been identified as containing malicious code by the OpenSSF malicious packages project. This classification indicates that the package itself is intentionally harmful or contains backdoors or malware, rather than a vulnerability that can be patched. No further technical details or exploit mechanisms are provided in the source data.

References

github.com/advisories/GHSA-c5h8-8cx3-chjg (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 18 Jul 2026, 17:14 UTC

Technical details

References

Community reviews