CVE-2026-8328CWE-918ssrf

CVE-2026-8328

published May 14, 2026

CVSS
5.9
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
5.9 · NONE
CVSS v4.0
Not supplied
EPSS
0.00457 · 38.7th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-14T01:16Z
References (10)
https://github.com/python/cpython/commit/2bbcf3fb7a420a05605576c0f9468d4675381b5f · [email protected]https://github.com/python/cpython/commit/5dadc64673ce875ebfb24163907777dae0f6ca06 · [email protected]https://github.com/python/cpython/commit/7d95a1dc7382b55cba7fdd6a110336077584a4f0 · [email protected]https://github.com/python/cpython/commit/bb3446dda6c49b32e67c11dbbbf221b40be00763 · [email protected]https://github.com/python/cpython/commit/c88704431ea3248ca769384c13856330976fac1d · [email protected]https://github.com/python/cpython/commit/eac4fe3b2c77693790a5ef7dfab127c1fee81bf9 · [email protected]https://github.com/python/cpython/commit/ef12d0dc824baccf737bba1458e5eed3d1e0fceb · [email protected]https://github.com/python/cpython/issues/87451 · [email protected]https://github.com/python/cpython/pull/149648 · [email protected]https://mail.python.org/archives/list/[email protected]/thread/ITF2BAPBQEPYK3LDMPRSY435JGNHYNDP/ · [email protected]
EPSS history
Timeline
  • 13 MAY 20:14Z
    FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address
    cvelistv5