AIKIDO-2026-10228
pyo3 is vulnerable to Undefined Behavior
20
Low Risk
This Affects:
pyo3TL;DR
Affected versions of this package are vulnerable to memory corruption when extending native Python types (e.g., #[pyclass(extends=PyList)]) on Python 3.12+ with the abi3 feature enabled. Subclasses incorrectly use their own type when accessing base class data, leading to improper memory access. The issue is fixed by ensuring the correct base type is used during data access.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
pyo3 is vulnerable to Undefined Behavior in versions 0.28.0 - 0.28.1.
How to fix this
Upgrade the pyo3 library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant