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.
References
| Link | Resource |
|---|---|
| https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c | Exploit Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
30 Mar 2026, 20:36
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c - Exploit, Vendor Advisory | |
| First Time |
Librechat
Librechat librechat |
|
| CPE | cpe:2.3:a:librechat:librechat:0.8.3:rc2:*:*:*:*:*:* cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:* cpe:2.3:a:librechat:librechat:0.8.3:rc1:*:*:*:*:*:* |
Information
Published : 2026-03-27 20:16
Updated : 2026-03-30 20:36
NVD link : CVE-2026-31943
Mitre link : CVE-2026-31943
CVE.ORG link : CVE-2026-31943
JSON object : View
Products Affected
librechat
- librechat
CWE
CWE-918
Server-Side Request Forgery (SSRF)