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.
Exploitability
AV:NAC:LPR:LUI:NScope
S:CImpact
C:HI:LA:N8.5/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:NInput Validation