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    <lastBuildDate>Thu, 08 Oct 2026 02:48:44 +0000</lastBuildDate>
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      <title>CVE-2026-27905 — BentoML has an Arbitrary File Write via Symlink Path Traversal in Tar Extraction</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-27905</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; BentoML&lt;/p&gt;
&lt;p&gt;BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.36, the safe_extract_tarfile() function validates that each tar member&amp;#39;s path is within the destination directory, but for symlink members it only validates the symlink&amp;#39;s own path, not the symlink&amp;#39;s target. An attacker can create a malicious bento/model tar file containing a symlink pointing outside the extraction directory, followed by a regular file that writes through the symlink, achieving arbitrary file write on the host filesystem. This vulnerability is fixed in 1.4.36.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; BentoML&lt;/p&gt;
&lt;p&gt;BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.36, the safe_extract_tarfile() function validates that each tar member&amp;#39;s path is within the destination directory, but for symlink members it only validates the symlink&amp;#39;s own path, not the symlink&amp;#39;s target. An attacker can create a malicious bento/model tar file containing a symlink pointing outside the extraction directory, followed by a regular file that writes through the symlink, achieving arbitrary file write on the host filesystem. This vulnerability is fixed in 1.4.36.&lt;/p&gt;</content:encoded>
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