CVE-2026-43914
Description
A flaw was found in Vaultwarden, a Bitwarden-compatible server. A remote attacker can exploit an unprotected two-factor authentication (2FA) function, send_email_login, to bypass login brute-force protection. This allows the attacker to repeatedly attempt password guesses without rate-limiting, potentially leading to unauthorized access to user accounts, even for users who do not have email 2FA configured.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
An attacker could perform an arbitrary number of authentication attempts using different passwords, and eventually gain access to the targeted account using a brute force attack.
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