CVE-2026-54040

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 Vector

References

• https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gv
• https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gv