{"id":86439,"date":"2026-02-11T13:13:31","date_gmt":"2026-02-11T13:13:31","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T06:00:00","slug":"cve-2025-4138-python-tarfile-module-vulnerability-allowing-metadata-modification-and-symlink-targets-modification","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4138-python-tarfile-module-vulnerability-allowing-metadata-modification-and-symlink-targets-modification\/","title":{"rendered":"CVE-2025-4138: Python Tarfile Module Vulnerability Allowing Metadata Modification and Symlink Targets Modification<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

This report covers the CVE-2025-4138 vulnerability, a significant flaw in the Python tarfile module. This vulnerability allows the extraction filter to be bypassed, enabling symlink targets to point outside the destination directory and the modification of some file metadata. This affects developers and organizations that employ the tarfile module to extract untrusted tar archives using specific parameters. The vulnerability is of particular concern due to its potential for system compromise or data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-4138
\nSeverity: High (7.5 CVSS score)
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Potential system compromise and data leakage<\/p>\n

Affected Products<\/strong><\/p>

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\r\n \r\n \"Ameeba\r\n <\/a>\r\n Share secrets securely\r\n <\/h2>\r\n\r\n

\r\n Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n <\/p>\r\n\r\n

\r\n Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n <\/p>\r\n\r\n