VulnerabilityPublished 15 Apr 2026Updated 1 Sep 2026

chai-as-evm (npm) · Malicious Code

Affects chai-as-evmSource GCVE Database

Severity

High

Rated by Threat Radar

Data as of 8 Sep 2026, 09:07 UTC

What to do

Affected software

Product	Affected	Fixed in
npmchai-as-evm	Affected =1.1.2	Fixed in–

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AI-suggested

Avoid using the chai-as-evm package version 1.1.2. Monitor dependency sources carefully to prevent inclusion of malicious packages.

Description

The npm package chai-as-evm version 1.1.2 contains malicious code that, when imported, downloads and executes a command-and-control (C2) dropper from a remote URL. This behavior is similar to previously observed malware in other npm packages such as chai-await-test. There is no CVSS score available for this threat.

Impact

If a developer or system imports chai-as-evm version 1.1.2, the malicious code will execute, potentially allowing an attacker to run arbitrary code on the host system via the downloaded C2 dropper. This can lead to system compromise, data theft, or further malware deployment. No known exploits in the wild are reported at this time.

Summary

The chai-as-evm package version 1.1.2 is identified as malicious because it includes code that fetches a C2 dropper from https://jsonkeeper[.]com/b/FAWPU and executes it upon import. This indicates the package is designed to perform unauthorized remote code execution by downloading and running external malware. The malicious behavior is confirmed by Amazon Inspector and is catalogued under MAL-2026-2889 and GHSA-826h-2vvx-vf77.

References

Community reviews

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What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Sep 2026, 09:07 UTC

Technical details

References

Community reviews