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CVE-2026-5713— Out-of-bounds read/write during remote profiling and asyncio process introspection when connecting to malicious target

Quick assessment

Affected
Python Software Foundation CPython
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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profiling.sampling模块和asyncio自省功能，可能导致读取和写入特权进程中的地址。

CVSS 5.3 · Medium EPSS 0.15% · P4

Affected Version Matrix 2

VendorProduct Version RangeStatus
Python Software Foundation CPython < 3.14.5 affected
3.15.0a1< 3.15.0b1 affected
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I. Basic Information for CVE-2026-5713

Vulnerability Information
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Vulnerability Title
Out-of-bounds read/write during remote profiling and asyncio process introspection when connecting to malicious target
Source: CVE Program / CVE List V5
Vulnerability Description
The "profiling.sampling" module (Python 3.15+) and "asyncio introspection capabilities" (3.14+, "python -m asyncio ps" and "python -m asyncio pstree") features could be used to read and write addresses in a privileged process if that process connected to a malicious or "infected" Python process via the remote debugging feature. This vulnerability requires persistently and repeatedly connecting to the process to be exploited, even after the connecting process crashes with high likelihood due to ASLR.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
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profiling.sampling模块和asyncio自省功能，可能导致读取和写入特权进程中的地址。
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 ~ 3.14.5 -

II. Public POCs for CVE-2026-5713

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III. Intelligence Information for CVE-2026-5713

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Patches & Fixes for CVE-2026-5713 (3)

Security Blog Posts for CVE-2026-5713 (1)

IV. Related Vulnerabilities

Same product: CPython
Same vendor: Python Software Foundation
Same weakness: CWE-121

V. Comments for CVE-2026-5713

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