VULNERABILITY INTELLIGENCE

CVE-2026-54040

CVSS score5.9 MEDIUM
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-06-25
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-306

Primary references