GCVE-110-OSM-2026-2005

Advisory PublishedCVSS 5.4/10

Vulnetix · Advisory published April 12, 2026

Bug bounty dependency confusion attempt. Package exfiltrates basic system information (hostname, IP, DNS) to security research infrastructure. Behaviors: data exfiltration, network activity, install-time execution. Payload: poc.js Key findings: - OAST/Interactsh Exfiltration in poc.js: "oastify.com" - Install Hook Executes Local JS File in package.json: ""preinstall": "node poc.js"" - Suspicious Domain in poc.js: "oastify.com" - Platform Detection with Data Collection in poc.js: "JSON.stringify({ pkg: '@b2b-portal/kit', host: os.hostname(), user: os" - Very New NPM Publisher Account IOCs: - domains: 2fia6l2v45k2r33mwqizx50fg6mxaryg.oastify.com - payloadFileHash: 5009f20f43a9a7776a43ce41acc58af3388b9905f71dc23cb65e55b62ef5d1e9

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

5.4/10

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

Affected Products

Vendor	Product	Versions	Platforms
unknown	@b2b-portal/kit	all (affected)	—

References

Malicious npm package: @b2b-portal/kit

advisory

vendor

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