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      <title>CVE-2026-71981 — Cypht &lt; 2.12.2 PHP Object Injection RCE via back_query Parameter</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-71981</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; cypht-org cypht&lt;/p&gt;
&lt;p&gt;Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can pass a base64-encoded serialized payload through this parameter, which is decoded and passed directly to unserialize() without an allow-list, signature check, or type restriction, enabling gadget-chain exploitation to achieve remote code execution as the web server process.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; cypht-org cypht&lt;/p&gt;
&lt;p&gt;Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can pass a base64-encoded serialized payload through this parameter, which is decoded and passed directly to unserialize() without an allow-list, signature check, or type restriction, enabling gadget-chain exploitation to achieve remote code execution as the web server process.&lt;/p&gt;</content:encoded>
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