Vulnerabilities CVE-2026-8328

CVE-2026-8328

Medium

Open

TLP:CLEAR

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

NVD CVE.org

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Description

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.

Details

CVSS Score: 5.9
EPSS Score ⓘ: 0.46%

37.7th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Confidence: 90%
Published: May 13, 2026
Last Modified: Aug 13, 2026

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