GCVE-110-OSM-2026-4778

Advisory PublishedCVSS 5.4/10

Vulnetix · Advisory published May 26, 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. Entrypoint: callback.js (install-hook: node callback.js) Exfil: https://1z1j2a47uak4ulyerl74nrkozf56twhl.oastify.com/ (oast, recovery: plaintext in callback.js) Payload: callback.js Key findings: - OAST/Interactsh Exfiltration in callback.js: "oastify.com" - Publisher Has Other Malicious Packages - Data Encoding for Exfiltration in callback.js: "encodeURIComponent(pkg) + '/' + hostHash + '/' + Date.now" - Install Hook Executes Local JS File in package.json: ""postinstall": "node callback.js"" IOCs: - oastEndpoints: https://1z1j2a47uak4ulyerl74nrkozf56twhl.oastify.com/ - payloadFileHash: a1b0ffd6ae59141dea5874c09bf9c49c65ed523b981cad501ae0cb9b2ae99c5f

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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	@timelycare/core	all (affected)	—

References

Malicious npm package: @timelycare/core

advisory

vendor

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