CVE-2026-54036 (GCVE-0-2026-54036)

Vulnerability from cvelistv5 – Published: 2026-06-25 15:39 – Updated: 2026-06-25 16:01
VLAI
Title
LibreChat: 2FA Re-enrollment Allows Full Account 2FA Takeover Without OTP Verification
Summary
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the GET /api/auth/2fa/enable endpoint can be called by an authenticated user (or attacker with a stolen session) even when 2FA is already fully enabled on the account. This endpoint overwrites the existing TOTP secret, generates new backup codes, and sets twoFactorEnabled to false — all without requiring any TOTP or backup code verification. An attacker with a valid session token can completely take over a victim's 2FA, locking the legitimate user out of their own two-factor authentication. This vulnerability is fixed in 0.8.4-rc1.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 16:01 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
danny-avila LibreChat Affected: < 0.8.4-rc1
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