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    <title>Most recent entries from all</title>
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      <title>CVE-2026-82639 — NextChat 2.15.8 through 2.16.1 OpenAI API Key Disclosure</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-82639</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; ChatGPTNextWeb NextChat&lt;/p&gt;
&lt;p&gt;NextChat versions from 2.15.8 through 2.16.1 contain an improper URL validation vulnerability in the proxy endpoint that allows attackers to obtain the server&amp;#39;s OpenAI API key. The x-base-url header is validated using substring matching instead of hostname parsing, allowing any URL containing &amp;#39;api.openai.com&amp;#39; to pass validation and receive the server&amp;#39;s credentials in the Authorization header.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; ChatGPTNextWeb NextChat&lt;/p&gt;
&lt;p&gt;NextChat versions from 2.15.8 through 2.16.1 contain an improper URL validation vulnerability in the proxy endpoint that allows attackers to obtain the server&amp;#39;s OpenAI API key. The x-base-url header is validated using substring matching instead of hostname parsing, allowing any URL containing &amp;#39;api.openai.com&amp;#39; to pass validation and receive the server&amp;#39;s credentials in the Authorization header.&lt;/p&gt;</content:encoded>
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