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Malicious code in mcp-dev-toolkit (npm)

0
High
Published: 08/19/2026 (08/19/2026, 08:16:01 UTC)
Source: GCVE Database
Product: mcp-dev-toolkit

Description

The npm package mcp-dev-toolkit version 1.5.0 contains malicious code that performs host reconnaissance, data exfiltration, and self-propagation. Specifically, it collects host identity information and sends it outbound, and executes commands to push code to a remote git repository. This behavior is inconsistent with legitimate developer toolkit functionality and indicates installer-side malware activity.

Affected software

npmghsa
mcp-dev-toolkit
Affected versions
=1.5.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/19/2026, 14:15:47 UTC

Technical Analysis

The [email protected] npm package includes multiple files exhibiting malicious behavior. The index.js file collects host identity data such as hostname, current working directory, and version, then serializes and transmits this data outbound. The spread.js file uses child_process and HTTPS requests to send host and process data externally. The c2_exfil.js file explicitly performs command execution to push content from the installer's environment to a remote git repository, facilitating self-propagation. These combined behaviors represent reconnaissance, exfiltration, and code propagation triggered upon installation or import, which are not consistent with legitimate development tools.

Potential Impact

This malicious package can compromise the confidentiality of the host by exfiltrating system identity information. It also risks integrity and availability by executing commands that push code to remote repositories, potentially spreading malicious code further. The presence of such malware in a developer toolkit can lead to supply chain compromise and unauthorized data leakage.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix or removal guidance is provided, users should avoid installing or using [email protected]. Conduct thorough environment scans for signs of compromise if this version has been installed. Consider removing the package and replacing it with a verified clean alternative.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-14295
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a85b4b4acd9273b49251548

Added to database: 08/19/2026, 13:50:44 UTC

Last enriched: 08/19/2026, 14:15:47 UTC

Last updated: 08/19/2026, 17:29:40 UTC

Views: 3

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