CVE-2026-4224— Stack overflow parsing XML with deeply nested DTD content models
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I. Basic Information for CVE-2026-4224
Vulnerability Information
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Vulnerability Title
Stack overflow parsing XML with deeply nested DTD content models
Source: NVD (National Vulnerability Database)
Vulnerability Description
When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
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，该漏洞源于解析包含深度嵌套内容模型的内联文档类型定义时，可能导致C栈溢出。
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 ~ 3.13.13 | - |
II. Public POCs for CVE-2026-4224
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: CPython
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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
V. Comments for CVE-2026-4224
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