CVE-2025-4435— Tarfile extracts filtered members when errorlevel=0
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I. Basic Information for CVE-2025-4435
Vulnerability Information
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Vulnerability Title
Tarfile extracts filtered members when errorlevel=0
Source: NVD (National Vulnerability Database)
Vulnerability Description
When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
CPython 安全漏洞
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存在安全漏洞，该漏洞源于TarFile.errorlevel = 0时过滤成员未被跳过仍被提取。
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 ~ 3.10.18 | - |
II. Public POCs for CVE-2025-4435
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|---|
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Same Patch Batch · Python Software Foundation · 2025-06-03 · 5 CVEs total
| CVE-2025-4517 | 9.4 CRITICAL | Arbitrary writes via tarfile realpath overflow |
| CVE-2025-4138 | 7.5 HIGH | Bypassing extraction filter to create symlinks to arbitrary targets outside extraction dir |
| CVE-2025-4330 | 7.5 HIGH | Extraction filter bypass for linking outside extraction directory |
| CVE-2024-12718 | 5.3 MEDIUM | Bypass extraction filter to modify file metadata outside extraction directory |
IV. Related Vulnerabilities
Same product: CPython
- 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 - CVE-2026-4786
Incomplete mitigation of CVE-2026-4519, %action expansion fo
Same vendor: Python Software Foundation
- 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 - CVE-2026-4786
Incomplete mitigation of CVE-2026-4519, %action expansion fo
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