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      <title>CVE-2026-42256 — net-imap: Denial of service via high iteration count for `SCRAM-*` authentication</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-42256</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; ruby net-imap&lt;/p&gt;
&lt;p&gt;Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; ruby net-imap&lt;/p&gt;
&lt;p&gt;Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.&lt;/p&gt;</content:encoded>
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