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CVE-2026-31943

LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
danny-avila / LibreChataffected < 0.8.3

CWE

CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.