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      <title>CVE-2026-31943 — LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-31943</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; danny-avila LibreChat&lt;/p&gt;
&lt;p&gt;LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, `isPrivateIP()` in `packages/api/src/auth/domain.ts` fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protection and make the server issue HTTP requests to internal network resources — including cloud metadata services (e.g., AWS `169.254.169.254`), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; danny-avila LibreChat&lt;/p&gt;
&lt;p&gt;LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, `isPrivateIP()` in `packages/api/src/auth/domain.ts` fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protection and make the server issue HTTP requests to internal network resources — including cloud metadata services (e.g., AWS `169.254.169.254`), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.&lt;/p&gt;</content:encoded>
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