What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-14 · updated 2026-10-26
• Weakness: CWE-121

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.

Affected products

• Python: before 3.14.5; from 3.15.0a1 before 3.15.0b1 — fixed in 3.14.5, 3.15.0b1

How to fix

Upgrade to a fixed version: Python 3.14.5, 3.15.0b1. Check the vendor advisory for mitigations.

References

• https://github.com/python/cpython/commit/289fd2c97a7e5aecb8b69f94f5e838ccfeee7e67
• https://github.com/python/cpython/commit/316f6265b7f9ca4ffed5346b747475ef1943f35d
• https://github.com/python/cpython/issues/148178
• https://github.com/python/cpython/pull/148187
• https://mail.python.org/archives/list/security-announce@python.org/thread/OG4RHARYSNIE22GGOMVMCRH76L5HKPLM/
• http://www.openwall.com/lists/oss-security/2026/04/15/6

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