CVE-2026-31943 | BDVDB-2026-323401 Detail

Description#

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.

Impact#

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Exploit#

History#

1. Version 12026-03-27Record published in the CVE List.
2. Version 22026-03-31Most recent update recorded in the CVE List.