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    <lastBuildDate>Tue, 06 Oct 2026 04:22:20 +0000</lastBuildDate>
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      <title>CVE-2023-42460 — _abi_decode input not validated in complex expressions in Vyper</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-42460</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; vyperlang vyper&lt;/p&gt;
&lt;p&gt;Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; vyperlang vyper&lt;/p&gt;
&lt;p&gt;Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.&lt;/p&gt;</content:encoded>
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