CVE-2026-54040

Summary of CVE-2026-54040 (LibreChat): Before version 0.8.4-rc1, the POST /api/auth/2fa/backup/regenerate endpoint regenerates all 2FA backup codes without requiring a valid TOTP token or existing backup code verification. An attacker with a stolen session token can silently replace a victim’s 2F...

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 codes without requiring any TOTP token or existing backup code verification. An attacker with a stolen session token can...

EUVD-2026-39456

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...

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 codes without requiring any TOTP token or existing backup code verification. An attacker with a stolen session token can...

CVE-2026-54040

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...

CVE-2026-54036

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 existi...

CVE-2026-54036 LibreChat: 2FA Re-enrollment Allows Full Account 2FA Takeover Without OTP Verification

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 existi...

CVE-2026-54036 LibreChat: 2FA Re-enrollment Allows Full Account 2FA Takeover Without OTP Verification

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 existi...

CVE-2026-54036

CVE-2026-54036 (LibreChat) describes a vulnerability where the GET /api/auth/2fa/enable endpoint can be invoked by an authenticated user (or attacker with a stolen session) even when 2FA is fully enabled. The call overwrites the existing TOTP secret, regenerates backup codes, and sets twoFactorEn...

PT-2026-52497

Name of the Vulnerable Software and Affected Versions LibreChat versions prior to 0.8.4-rc1 Description The application allows the regeneration of all two-factor authentication 2FA backup codes without requiring a Time-based One-Time Password TOTP token or the verification of an existing backup...

CVE-2026-56338

Capgo before 12.128.2 contains a denial of service vulnerability in the /auth/v1/otp endpoint that prevents email verification for two-factor authentication due to captcha validation failures. Authenticated users cannot complete 2FA enrollment as the backend consistently returns HTTP 500 errors...

CVE-2026-56256

Capgo before 12.128.2 enforces mandatory two-factor authentication only at the UI level. Sensitive Organization ORG management API endpoints e.g., editing organization details, inviting users do not validate 2FA completion on the backend. An authenticated Admin user who has not enabled 2FA can...

CVE-2026-56338 Capgo - Denial of Service in 2FA Email Verification via /auth/v1/otp Endpoint

Capgo before 12.128.2 contains a denial of service vulnerability in the /auth/v1/otp endpoint that prevents email verification for two-factor authentication due to captcha validation failures. Authenticated users cannot complete 2FA enrollment as the backend consistently returns HTTP 500 errors...

CVE-2026-56338

Capgo before 12.128.2 contains a denial of service vulnerability in the /auth/v1/otp endpoint that prevents email verification for two-factor authentication due to captcha validation failures. Authenticated users cannot complete 2FA enrollment as the backend consistently returns HTTP 500 errors...

CVE-2026-56338

Capgo prior to version 12.128.2 contains a denial-of-service flaw in the /auth/v1/otp endpoint used for 2FA email verification. The issue arises from captcha validation failures causing the backend to return HTTP 500 errors, preventing authenticated users from completing 2FA enrollment and access...

CVE-2026-56338 Capgo - Denial of Service in 2FA Email Verification via /auth/v1/otp Endpoint

Capgo before 12.128.2 contains a denial of service vulnerability in the /auth/v1/otp endpoint that prevents email verification for two-factor authentication due to captcha validation failures. Authenticated users cannot complete 2FA enrollment as the backend consistently returns HTTP 500 errors...

EUVD-2026-38752

Capgo before 12.128.2 contains a denial of service vulnerability in the /auth/v1/otp endpoint that prevents email verification for two-factor authentication due to captcha validation failures. Authenticated users cannot complete 2FA enrollment as the backend consistently returns HTTP 500 errors...

CVE-2026-56256

CVE-2026-56256 affects Capgo prior to 12.128.2, where 2FA is enforced only at the UI level. The backend ORG management API endpoints (e.g., editing organization details, inviting users) do not require 2FA, allowing an authenticated admin without 2FA to replay/modify a captured ORG API request to ...

CVE-2026-56256 Capgo - Two-Factor Authentication Bypass via Organization Management API

Capgo before 12.128.2 enforces mandatory two-factor authentication only at the UI level. Sensitive Organization ORG management API endpoints e.g., editing organization details, inviting users do not validate 2FA completion on the backend. An authenticated Admin user who has not enabled 2FA can...

CVE-2026-56256 Capgo - Two-Factor Authentication Bypass via Organization Management API

Capgo before 12.128.2 enforces mandatory two-factor authentication only at the UI level. Sensitive Organization ORG management API endpoints e.g., editing organization details, inviting users do not validate 2FA completion on the backend. An authenticated Admin user who has not enabled 2FA can...