GCVE-110-OSM-2026-4864

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published May 28, 2026

Malicious package detected. Behaviors: data exfiltration. Entrypoint: index.js (main: index.js) Exfil: https://www.jsonkeeper.com/b/HY6M6 (custom-c2, recovery: decoded in index.js) Payload: index.js Key findings: - Decoded Hex String Content in index.js - Payload Download from Paste Service in index.js: "jsonkeeper.com" - Brand New Package IOCs: - domains: learnboost.com, www.jsonkeeper.com - emails: tj@learnboost.com - urls: https://www.jsonkeeper.com/b/HY6M6 - payloadFileHash: 9eb97dcae23527bc66606235e0ad5d2c89692d311120dec3a636acf479e53047 Decoded/deobfuscated IOCs: - urls: https://www.jsonkeeper.com/b/HY6M6 - domains: www.jsonkeeper.com

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

9.6/10

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

Affected Products

Vendor	Product	Versions	Platforms
unknown	clx-cookie-signature	1.2.1 (affected)	—

References

Malicious npm package: clx-cookie-signature

advisory

vendor

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