GCVE-110-OSM-2026-5798

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published June 12, 2026

Malicious package detected. Behaviors: data exfiltration, code execution, obfuscated code, install-time execution. Entrypoint: postinstall.js (install-hook: node postinstall.js) Exfil: https://www.jsonkeeper.com/b/7EBZP (custom-c2, recovery: decoded in postinstall.js) Payload: postinstall.js Secondary files: [deobfuscated] postinstall.js Key findings: - Decoded Base64 Content in postinstall.js - Decoded Base64 Content in [deobfuscated] postinstall.js - Install Hook Executes Local JS File in package.json: ""postinstall": "node postinstall.js"" - Shell Command Execution in postinstall.js: "require('child_process')" - Dynamic Base64 Decoding in postinstall.js: "atob(DEV_API_KEY)" IOCs: - urls: http://babeljs.io/, https://www.jsonkeeper.com/b/7EBZP - domains: jongleberry.com, babeljs.io, www.jsonkeeper.com - emails: me@jongleberry.com - payloadFileHash: e40f5bda87054ad5b8c30efa4dce8ee8f78c014fd72afae62cbb7c1e40574e0b Decoded/deobfuscated IOCs: - urls: https://www.jsonkeeper.com/b/7EBZP - 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	richtext-editor-ui	all (affected)	—

References

Malicious npm package: richtext-editor-ui

advisory

vendor

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