CVE-2026-5713 is a stack-based buffer overflow vulnerability in CPython's profiling.sampling module (introduced in Python 3.15 and later) and asyncio introspection capabilities (available since Python 3.14). This flaw allows an attacker controlling a malicious Python process to read and write memory addresses in a privileged process if that process connects to the attacker via the remote debugging feature. Exploitation demands repeated and persistent connection attempts, as the target process is likely to crash frequently due to Address Space Layout Randomization (ASLR). No official remediation or patch has been published yet. The vulnerability affects exactly versions 3.14.0, 3.15.0, and 3.15.0a1 of CPython.

Successful exploitation could lead to unauthorized memory read and write access in a privileged Python process, potentially enabling privilege escalation or code execution. However, exploitation is difficult due to the need for persistent connection attempts and the high likelihood of process crashes caused by ASLR. There are no known exploits in the wild at this time.

No official patch or remediation has been published by the Python Software Foundation as of the current advisory. Users should monitor the vendor advisory for updates. Until a fix is available, avoid exposing privileged Python processes to untrusted remote debugging connections, and restrict access to debugging features to trusted environments only.