CVE-2025-8291— ZIP64 End of Central Directory (EOCD) Locator record offset not checked
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I. Basic Information for CVE-2025-8291
Vulnerability Information
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Vulnerability Title
ZIP64 End of Central Directory (EOCD) Locator record offset not checked
Source: NVD (National Vulnerability Database)
Vulnerability Description
The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Python 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。 Python存在安全漏洞，该漏洞源于未验证ZIP64 EOCD定位器记录偏移值有效性，可能导致ZIP档案处理不一致。
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 ~ 3.10.19 | - |
II. Public POCs for CVE-2025-8291
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: CPython
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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
V. Comments for CVE-2025-8291
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