CVE-2026-8328— FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Python Software Foundation | CPython | < 3.15.0 | affected |
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I. Basic Information for CVE-2026-8328
Vulnerability Information
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Vulnerability Title
FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
CPython 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CPython是Python基金会的一个用C语言实现的Python解释器。 CPython存在代码问题漏洞，该漏洞源于Lib/ftplib.py中的ftpcp()函数，可能导致攻击者控制IP地址和端口。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Python Software Foundation | CPython | 0 ~ 3.15.0 | - |
II. Public POCs for CVE-2026-8328
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/python/cpython/issues/87451issue-tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-8328
IV. Related Vulnerabilities
Same product: CPython
- CVE-2026-7210
The expat and elementtree parsers use insufficient entropy f - CVE-2026-3087
shutil.unpack_archive() doesn't check for Windows absolute p - CVE-2026-6019
BaseCookie.js_output() does not neutralize embedded characte - CVE-2026-3298
Out-of-bounds write in Windows asyncio.ProacterEventLoop.soc - CVE-2026-5713
Out-of-bounds read/write during remote profiling and asyncio
Same vendor: Python Software Foundation
- CVE-2026-7210
The expat and elementtree parsers use insufficient entropy f - CVE-2026-3087
shutil.unpack_archive() doesn't check for Windows absolute p - CVE-2026-6019
BaseCookie.js_output() does not neutralize embedded characte - CVE-2026-3298
Out-of-bounds write in Windows asyncio.ProacterEventLoop.soc - CVE-2026-5713
Out-of-bounds read/write during remote profiling and asyncio
Same weakness: CWE-918
- CVE-2026-8725
CoreWorxLab CAAL test-hass Endpoint webhooks.py server-side - CVE-2026-45338
Open WebUI: SSRF via OAuth Profile Picture URL in _process_p - CVE-2026-45347
Open WebUI: Blind server side request forgery (SSRF) via the - CVE-2026-45400
Open WebUI: Server-Side Request Forgery (SSRF) bypass in `va - CVE-2026-45401
Open WebUI: SSRF Bypass via HTTP Redirect Following in Web-F
V. Comments for CVE-2026-8328
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