MAL-2026-6576: Malicious code in checkmarx-claude-cache (npm)
The npm package 'checkmarx-claude-cache' version 1.0.0 impersonates the Checkmarx security vendor but is not officially published by them. It fetches and executes a remote script from a suspicious URL resembling an AWS region, without verifying the script's integrity. This behavior allows execution of arbitrary attacker-controlled code on the machine running the package CLI.
AI Analysis
Technical Summary
The 'checkmarx-claude-cache' npm package (version 1.0.0) masquerades as a legitimate Checkmarx tool but is malicious. Its CLI script downloads a setup script over HTTPS from a deceptive domain 'download.east-1.us.com' that mimics AWS naming conventions but is unrelated to Checkmarx. The downloaded script is executed directly via 'execSync' using PowerShell on Windows or bash on other OSes, without any hash or signature verification. This unpinned, unverified remote code execution mechanism enables attackers to run arbitrary code on the victim's system upon running the package CLI.
Potential Impact
Running the CLI of this package results in arbitrary code execution controlled by the attacker, potentially compromising the host system. The malicious package can lead to full system compromise, data theft, or further malware deployment. There are no known exploits in the wild reported yet.
Mitigation Recommendations
No official patch or remediation is currently available. Users should avoid installing or running the 'checkmarx-claude-cache' package version 1.0.0. Verify package authenticity by using official vendor scopes and sources. Monitor for updates or advisories from Checkmarx or trusted security sources regarding this package.
MAL-2026-6576: Malicious code in checkmarx-claude-cache (npm)
Description
The npm package 'checkmarx-claude-cache' version 1.0.0 impersonates the Checkmarx security vendor but is not officially published by them. It fetches and executes a remote script from a suspicious URL resembling an AWS region, without verifying the script's integrity. This behavior allows execution of arbitrary attacker-controlled code on the machine running the package CLI.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The 'checkmarx-claude-cache' npm package (version 1.0.0) masquerades as a legitimate Checkmarx tool but is malicious. Its CLI script downloads a setup script over HTTPS from a deceptive domain 'download.east-1.us.com' that mimics AWS naming conventions but is unrelated to Checkmarx. The downloaded script is executed directly via 'execSync' using PowerShell on Windows or bash on other OSes, without any hash or signature verification. This unpinned, unverified remote code execution mechanism enables attackers to run arbitrary code on the victim's system upon running the package CLI.
Potential Impact
Running the CLI of this package results in arbitrary code execution controlled by the attacker, potentially compromising the host system. The malicious package can lead to full system compromise, data theft, or further malware deployment. There are no known exploits in the wild reported yet.
Mitigation Recommendations
No official patch or remediation is currently available. Users should avoid installing or running the 'checkmarx-claude-cache' package version 1.0.0. Verify package authenticity by using official vendor scopes and sources. Monitor for updates or advisories from Checkmarx or trusted security sources regarding this package.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-6576
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a42ed7627e9c79719939572
Added to database: 06/29/2026, 22:11:02 UTC
Last enriched: 06/29/2026, 22:40:26 UTC
Last updated: 06/30/2026, 01:00:39 UTC
Views: 2
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