Vulnerability Description
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/auth/2fa/backup/regenerate endpoint regenerates all 2FA backup codes without requiring any TOTP token or existing backup code verification. An attacker with a stolen session token can silently replace a victim's backup codes and use them to bypass 2FA login or disable 2FA entirely. This vulnerability is fixed in 0.8.4-rc1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Librechat | Librechat | <= 0.8.3 |
Related Weaknesses (CWE)
References
- https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gvExploitVendor Advisory
- https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gvExploitVendor Advisory
FAQ
What is CVE-2026-54040?
CVE-2026-54040 is a vulnerability with a CVSS score of 5.9 (MEDIUM). LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/auth/2fa/backup/regenerate endpoint regenerates all 2FA backup codes without requiring any...
How severe is CVE-2026-54040?
CVE-2026-54040 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54040?
Check the references section above for vendor advisories and patch information. Affected products include: Librechat Librechat.