CVE-2026-54040 — LibreChat: 2FA Backup Code Regeneration Without OTP Verification Allows 2FA Bypass
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 code…
Published: 2026-06-25 · CVSS: 5.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7