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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Wed, 07 Oct 2026 06:29:45 +0000</lastBuildDate>
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      <title>CVE-2026-27167 — Gradio: Mocked OAuth Login Exposes Server Credentials and Uses Hardcoded Session Secret</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-27167</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; gradio-app gradio&lt;/p&gt;
&lt;p&gt;Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable &amp;#34;mocked&amp;#34; OAuth routes when OAuth components (e.g. `gr.LoginButton`) are used. When a user visits `/login/huggingface`, the server retrieves its own Hugging Face access token via `huggingface_hub.get_token()` and stores it in the visitor&amp;#39;s session cookie. If the application is network-accessible, any remote attacker can trigger this flow to steal the server owner&amp;#39;s HF token. The session cookie is signed with a hardcoded secret derived from the string `&amp;#34;-v4&amp;#34;`, making the payload trivially decodable. Version 6.6.0 fixes the issue.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; gradio-app gradio&lt;/p&gt;
&lt;p&gt;Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable &amp;#34;mocked&amp;#34; OAuth routes when OAuth components (e.g. `gr.LoginButton`) are used. When a user visits `/login/huggingface`, the server retrieves its own Hugging Face access token via `huggingface_hub.get_token()` and stores it in the visitor&amp;#39;s session cookie. If the application is network-accessible, any remote attacker can trigger this flow to steal the server owner&amp;#39;s HF token. The session cookie is signed with a hardcoded secret derived from the string `&amp;#34;-v4&amp;#34;`, making the payload trivially decodable. Version 6.6.0 fixes the issue.&lt;/p&gt;</content:encoded>
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