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CVE-2026-8328

FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address PUBLISHED

Description (CNA)

The ftpcp() function in Lib/ftplib.py was not updated when CVE-2021-4189 was fixed. While makepasv() was patched to replace server-supplied PASV host addresses with the actual peer address (getpeername()[0]), ftpcp() still calls parse227() directly and passes the raw attacker-controllable IP address and port to target.sendport(). This patch is related to CVE-2021-4189.

Affected (CNA)

Vendor / productVersions
Python Software Foundation / CPythonaffected 0 before 3.10.21; affected 3.11.0 before 3.11.16; affected 3.12.0 before 3.12.14; affected 3.13.0 before 3.13.14; affected 3.14.0 before 3.14.6; affected 3.15.0a1 before 3.15.0b2

CWE

CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.