Malicious code in 4123 (PyPI)
Malicious code was discovered in the PyPI package 4123. The package was identified by the OpenSSF malicious-packages project and assigned identifier MAL-2024-4727.
- Disclosed
- Last updated
- Blast radius
- Unknown scope; package name suggests minimal adoption
- Ecosystems
- Attack vectors
- Affected entities
- 4123PyPI package
The PyPI package 4123 was found to contain malicious code. The discovery was credited to the OpenSSF's malicious-packages project, which maintains a catalog of known malicious packages across package ecosystems.\n\nThe incident was tracked under identifier MAL-2024-4727 in the OpenSSF malicious-packages repository. A GitHub Security Advisory (GHSA-4rv5-2h67-63wg) was issued to document the finding.\n\nNo specific details about the nature of the malicious code, affected versions, or remediation steps beyond package removal are provided in the source material.
Indicators of compromise
- Packages
- 4123
Remediation
- Remove the 4123 package from all environments
- Audit systems that may have installed 4123 for signs of compromise
- Review package dependencies to ensure no reliance on 4123
- Update to a safe alternative if 4123 was providing legitimate functionality
Sources
- GitHub Advisory GHSA-4rv5-2h67-63wg · GitHub Advisory Database
Cite this entry
"Malicious code in 4123 (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-4123-pypi-1f9rkt
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