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    <lastBuildDate>Mon, 12 Oct 2026 08:14:11 +0000</lastBuildDate>
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      <title>RUSTSEC-2026-0013 — Type confusion when accessing data from sublasses of subclasses of native types with `abi3` feature targeting Python 3.…</title>
      <link>https://vulnerability.circl.lu/vuln/rustsec-2026-0013</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; crates.io: pyo3&lt;/p&gt;
&lt;p&gt;PyO3 0.28.1 added support for `#[pyclass(extends=PyList)] struct NativeSub` (and other native types) when targeting Python 3.12 and up with the `abi3` feature.&lt;/p&gt;
&lt;p&gt;It was discovered that subclasses of such classes would use the type of the subclass when attempting to access to data of `NativeSub` contained within Python objects, amounting to memory corruption.&lt;/p&gt;
&lt;p&gt;PyO3 0.28.2 fixed the issue by using the type of (e.g.) `NativeSub` correctly.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; crates.io: pyo3&lt;/p&gt;
&lt;p&gt;PyO3 0.28.1 added support for `#[pyclass(extends=PyList)] struct NativeSub` (and other native types) when targeting Python 3.12 and up with the `abi3` feature.&lt;/p&gt;
&lt;p&gt;It was discovered that subclasses of such classes would use the type of the subclass when attempting to access to data of `NativeSub` contained within Python objects, amounting to memory corruption.&lt;/p&gt;
&lt;p&gt;PyO3 0.28.2 fixed the issue by using the type of (e.g.) `NativeSub` correctly.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/rustsec-2026-0013</guid>
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