Exploit for Improper Restriction of Excessive Authentication Attempts in Dani-Garcia Vaultwarden

CVE-2026-43914 — Vaultwarden Email-2FA Brute-Force Protection...

CVE-2026-43914

A flaw was found in Vaultwarden, a Bitwarden-compatible server. A remote attacker can exploit an unprotected two-factor authentication 2FA function, sendemaillogin, to bypass login brute-force protection. This allows the attacker to repeatedly attempt password guesses without rate-limiting,...

CVE-2026-43914

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.4, there is a security vulnerability in Vaultwarden that allows bypassing the login brute-force protection if email 2fa is enabled. If email 2fa is enabled, the unprotected 2fa-function sendemaillogin email.rs, api endpoi...

CVE-2026-43914 Vaultwarden: Brute-force protection bypass vulnerability

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.4, there is a security vulnerability in Vaultwarden that allows bypassing the login brute-force protection if email 2fa is enabled. If email 2fa is enabled, the unprotected 2fa-function sendemaillogin email.rs, api endpoi...