medium5.9
CVE-2026-54040
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Librechat | Librechat | through 0.8.3 |