CVE-2026-8328
FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address
EPSS 0.05%
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.
How to fix CVE-2026-8328
To remediate CVE-2026-8328, upgrade the affected package to a fixed version below.
- Bitnami/libpython—upgrade to 3.14.5 or later
- —upgrade to 3.14.5 or later
- —upgrade to 3.14.5 or later
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
Is CVE-2026-8328 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (9)
- from 0, < 3.14.5
- from 0, < 3.14.5
- from 0, < 3.14.5
- from 0
- from 0
- from 0
- from 0
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CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |