GCVE-110-OSM-2026-3731

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published May 9, 2026

[osmalyze-auto] Malicious package detected. Behaviors: data exfiltration, code execution. [osmalyze-auto] Entrypoint: index.js (main: index.js) Payload: lib/const.js Secondary files: index.js Key findings: - Stealth Background Process Spawning in index.js: "spawn("node", [script, JSON.stringify(args)], { detached: true, stdio: "..." - Decoded Base64 Content in lib/const.js - Shell Command Execution in index.js: "require("child_process")" - Silent Process Execution in index.js: "stdio: "ignore"" - Detached Child Process Payload in index.js: "spawn("node", [script, JSON.stringify(args)], { detached: true" IOCs: - urls: http://192.168.1.42:9200, http://getflowlimit.io, http://getflowlimit.io/#/docs/browser., https://jsonkeeper.com/b/4NAKK - domains: jsonkeeper.com - payloadFileHash: d10853dde92fdc48d8cb5505d89e0030fd35e1416a16a820fe5ec4aceef01c4f Decoded/deobfuscated IOCs: - urls: https://jsonkeeper.com/b/4NAKK - domains: 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	express-guardrail	* (affected)	—

References

Malicious npm package: express-guardrail

advisory

vendor

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