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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Librechat Librechat
cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*
|
— |
0.8.3
|
|
Librechat Librechat
cpe:2.3:a:librechat:librechat:0.8.3:rc1:*:*:*:*:*:*
|
— | — |
|
Librechat Librechat
cpe:2.3:a:librechat:librechat:0.8.3:rc2:*:*:*:*:*:*
|
— | — |