GHSA-PVRJ-8CG3-J5F8 auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback

SSRF Protection Bypass via IPv4-mapped IPv6 Loopback Summary auth-fetch-mcp v3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6 loopback addresses in their...

PT-2026-37306

Name of the Vulnerable Software and Affected Versions ssrfcheck versions 1.3.0 and earlier Description ssrfcheck fails to block Server-Side Request Forgery SSRF attacks when a target private IP address is encoded as an IPv4-mapped IPv6 address e.g., 'http://::ffff:127.0.0.1/'. This occurs because...

CVE-2026-31943

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 ...