cue-mcp
This report shows the evidence for cue-mcp@9999.99.99, the only known version.
This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-6294 confirms this npm version as malicious.
Advisory
MAL-2026-6294
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in cue-mcp (npm)
Details
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.
References
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to cue-mcp@9999.99.99.
The versions list below shows the verdict for each recorded version.
- Avoid installing cue-mcp@9999.99.99. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.