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NVD Vulnerability Details :
CVE-2026-8328
Awaiting Analysis
More InfoOfficial Page
Source-cna@python.org
View Known Exploited Vulnerability (KEV) details
Published At-13 May, 2026 | 21:16
Updated At-30 Jun, 2026 | 16:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.05.9MEDIUM
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
N/A
Type: Secondary
Version: 4.0
Base score: 5.9
Base severity: MEDIUM
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/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
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-918Secondarycna@python.org
CWE ID: CWE-918
Type: Secondary
Source: cna@python.org
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/python/cpython/commit/2bbcf3fb7a420a05605576c0f9468d4675381b5fcna@python.org
N/A
https://github.com/python/cpython/commit/5dadc64673ce875ebfb24163907777dae0f6ca06cna@python.org
N/A
https://github.com/python/cpython/commit/7d95a1dc7382b55cba7fdd6a110336077584a4f0cna@python.org
N/A
https://github.com/python/cpython/commit/bb3446dda6c49b32e67c11dbbbf221b40be00763cna@python.org
N/A
https://github.com/python/cpython/commit/c88704431ea3248ca769384c13856330976fac1dcna@python.org
N/A
https://github.com/python/cpython/commit/eac4fe3b2c77693790a5ef7dfab127c1fee81bf9cna@python.org
N/A
https://github.com/python/cpython/commit/ef12d0dc824baccf737bba1458e5eed3d1e0fcebcna@python.org
N/A
https://github.com/python/cpython/issues/87451cna@python.org
N/A
https://github.com/python/cpython/pull/149648cna@python.org
N/A
https://mail.python.org/archives/list/security-announce@python.org/thread/ITF2BAPBQEPYK3LDMPRSY435JGNHYNDP/cna@python.org
N/A
Hyperlink: https://github.com/python/cpython/commit/2bbcf3fb7a420a05605576c0f9468d4675381b5f
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/commit/5dadc64673ce875ebfb24163907777dae0f6ca06
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/commit/7d95a1dc7382b55cba7fdd6a110336077584a4f0
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/commit/bb3446dda6c49b32e67c11dbbbf221b40be00763
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/commit/c88704431ea3248ca769384c13856330976fac1d
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/commit/eac4fe3b2c77693790a5ef7dfab127c1fee81bf9
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/commit/ef12d0dc824baccf737bba1458e5eed3d1e0fceb
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/issues/87451
Source: cna@python.org
Resource: N/A
Hyperlink: https://github.com/python/cpython/pull/149648
Source: cna@python.org
Resource: N/A
Hyperlink: https://mail.python.org/archives/list/security-announce@python.org/thread/ITF2BAPBQEPYK3LDMPRSY435JGNHYNDP/
Source: cna@python.org
Resource: N/A
Change History
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