🛡️ MAL-2026-6294 — cue-mcp

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in cue-mcp (npm)

Source: amazon-inspector

The package's postinstall.js script runs automatically on npm install and collects host identifying data (os.hostname()) along with process environment variables (process.env), then transmits the data over HTTPS. This shape — system-information harvesting at install time and outbound network transmission via the https module — is a classic install-time exfiltration pattern. There is no legitimate purpose served by reading the installer's environment variables and hostname during postinstall for a package of this kind. Environment variables on developer and CI machines routinely contain credentials (NPM_TOKEN, GITHUB_TOKEN, AWS keys, CI secrets), so this beacon constitutes credential exfiltration risk against any system that installs the package.

Affected software

MAL-2026-6294 is recorded against 1 package.

  • cue-mcp

Timeline and source

Published on 23 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-06-23
Updated 2026-08-12
Modified 2026-06-23
Fix URL N/A

Affected Packages

Software From version Fixed in
cue-mcp — —

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