GCVE-110-OSM-2026-2840

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published April 20, 2026

Malicious package detected. Behaviors: data exfiltration, install-time execution. Payload: scripts/preinstall.js Key findings: - Install Hook Executes Local JS File in package.json: ""preinstall": "node scripts/preinstall.js"" - Git Configuration Access in scripts/preinstall.js: ".gitconfig" - Brand New Package - Very New NPM Publisher Account IOCs: - payloadFileHash: db0fe53c0d1865bdb63b767addf59cd2fd6295fe32a5a2f4014878903bc5ccae

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

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

Affected Products

Vendor	Product	Versions	Platforms
unknown	@stdvoidfill/expres-session	1.18.1 (affected)	—

References

Malicious npm package: @stdvoidfill/expres-session

advisory

vendor

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