| Component | LibreChat |
| Severity | high (CVSS 7.5) |
| CVSS vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published (NVD) | 2025-03-20 |
| Last modified | 2026-06-17 |
| Affected versions | < 0.7.6 from the CVE Program record written by the CNA that assigned the CVE |
| Fixed in | 0.7.6 |
| Weakness | CWE-770 |
| CISA KEV | not listed |
NVD description
In danny-avila/librechat version git 0c2a583, there is an improper input validation vulnerability. The application uses multer middleware for handling multipart file uploads. When using in-memory storage (the default setting for multer), there is no limit on the upload file size. This can lead to a server crash due to out-of-memory errors when handling large files. An attacker without any privileges can exploit this vulnerability to cause a complete denial of service. The issue is fixed in version 0.7.6.
What to do
- Upgrade LibreChat to
0.7.6or later. - Do not expose the component's API or UI to the internet without authentication in front of it.