Sourced from pyo3's releases.

PyO3 0.28.2

This patch release contains a soundness fix for subclassing native types such as PyList with the abi3 feature enabled when targeting a minimum version of Python 3.12 or higher. (Support for doing such subclassing was newly added in PyO3 0.28.0.)

PyO3 0.28.0 and 0.28.1 will be yanked.

This release also contains a correction to the FFI definition PyType_GetTypeDataSize and incorrectly-generated __qualname__ on #[pyclass] enum variant types when using #[pyo3(name = "...")] option to rename the enum and/or variant.

Thank you to the following contributors for the improvements:

@​davidhewitt @​Icxolu @​ngoldbaum

Sourced from pyo3's changelog.

[0.28.2] - 2026-02-18

Fixed

• Fix complex enum __qualname__ not using python name #5815
• Fix FFI definition PyType_GetTypeDataSize (was incorrectly named PyObject_GetTypeDataSize). #5819
• Fix memory corruption when subclassing native types with abi3 feature on Python 3.12+ (newly enabled in PyO3 0.28.0). #5823

• 2b392c8 release: 0.28.2
• 7e44c1d fix complex enum __qualname__ not using python name (#5815)
• 75abd86 fix memory corruption when subclassing variable-size types (e.g. abi3 + 3.1...
• b62c7a2 Fix typo in PyType_GetTypeDataSize bindings (#5819)
• See full diff in compare view

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