Python JSON Logger Vulnerability Enables Remote Code Execution – PoC Released

Summary: A newly disclosed remote code execution (RCE) vulnerability, CVE-2025-27607, has been identified in the Python JSON Logger package, affecting version 3.2.0 to 3.2.1. The vulnerability was caused by a missing optional development dependency, which could allow malicious actors to exploit the package if they registered under the same name on PyPI. Although its severity has been downgraded to “Low,” this incident highlights significant supply chain security concerns within open-source software ecosystems.

Affected: Python JSON Logger (versions 3.2.0, 3.2.1)

Keypoints :

• The vulnerability is attributed to CWE-829, highlighting the inclusion of untrusted code.
• Users are urged to upgrade to version 3.3.0 or above to mitigate the risks associated with this vulnerability.
• Regular audits of dependencies in open-source projects are recommended to enhance supply chain security.