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      <title>CVE-2026-18687 — Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corrupti…</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-18687</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; MongoDB Server&lt;/p&gt;
&lt;p&gt;MongoDB Server&amp;#39;s handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection&amp;#39;s encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; MongoDB Server&lt;/p&gt;
&lt;p&gt;MongoDB Server&amp;#39;s handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection&amp;#39;s encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.&lt;/p&gt;</content:encoded>
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