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CVE-2026-8328 is a server-side request forgery vulnerability in CPython's ftplib.ftpcp() function caused by incomplete remediation of CVE-2021-4189. The earlier fix changed makepasv() to replace server-supplied PASV host addresses with the FTP control connection's actual peer address. However, ftpcp() continues to call parse227() directly and passes the attacker-controlled host address and port to target.sendport(). An attacker-controlled FTP server can therefore influence the destination supplied in a PORT command, potentially inducing unintended network connections.
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A vulnerability tracked as CVE-2026-8328, covered by a Unity Linux security advisory/local security check. The provided CVSS vectors describe network attack surface, low attack complexity, no privileges required, and limited confidentiality impact; the available text does not identify the affected component or flaw type.
A vulnerability in ftplib's ftpcp() function where it trusts a server-supplied PASV host address instead of the actual peer address.
An FTP-related vulnerability where ftpcp() trusts a server-supplied PASV host address instead of using the actual peer address.
A vulnerability in Python's ftpcp() behavior where it trusts a server-supplied PASV host address instead of the actual peer address.
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Cross-references every affected SKU, including bundled OEM variants.
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