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      <title>CVE-2026-48959 — IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-48959</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; PMQS IO::Uncompress::Unzip&lt;/p&gt;
&lt;p&gt;IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.&lt;/p&gt;
&lt;p&gt;fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.&lt;/p&gt;
&lt;p&gt;Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-&amp;gt;new($zip, Name =&amp;gt; $target) drives a per-byte read loop scaling with the entry&amp;#39;s compressed size, up to the non-Zip64 4 GiB cap.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; PMQS IO::Uncompress::Unzip&lt;/p&gt;
&lt;p&gt;IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.&lt;/p&gt;
&lt;p&gt;fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.&lt;/p&gt;
&lt;p&gt;Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-&amp;gt;new($zip, Name =&amp;gt; $target) drives a per-byte read loop scaling with the entry&amp;#39;s compressed size, up to the non-Zip64 4 GiB cap.&lt;/p&gt;</content:encoded>
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