GCVE-110-OSM-2026-4852

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published May 28, 2026

Malicious package detected. Behaviors: data exfiltration, code execution, install-time execution. Entrypoint: scripts/postinstall.js (install-hook: node scripts/postinstall.js) Exfil: https://oob.moika.tech/report (custom-c2, recovery: plaintext in scripts/postinstall.js) Payload: scripts/postinstall.js Key findings: - Publisher Has Other Malicious Packages - Install Hook Executes Local JS File in package.json: ""postinstall": "node scripts/postinstall.js"" - Shell Command Execution in scripts/postinstall.js: "require('child_process')" - Silent Process Execution in scripts/postinstall.js: "stdio: 'ignore'" - Brand New Package IOCs: - urls: https://docs.polka-ui.io/platform/recoc, https://jira.polka-ui.io/projects/PLATFORM, https://npm.polka-ui.io, https://github.polka-ui.io/platform/recoc.git, https://oob.moika.tech/report (+1 more) - domains: oob.moika.tech - emails: platform@polka-ui.io - payloadFileHash: 5326c3ee7fc32b660959df826c13651928ea8e06c58635c1bdd16fe7e24b224d

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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	@polka-ui/recoc	9.9.9 (affected)	—

References

Malicious npm package: @polka-ui/recoc

advisory

vendor

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