CVE-2026-47164
Description
A flaw was found in Vaultwarden, a Bitwarden-compatible server. The Single Sign-On (SSO) login process, when configured to automatically link sign-ups by email, failed to verify the email address for existing user accounts. This allowed a remote attacker, by controlling an Identity Provider (IdP) identity that asserts a victim's email, to bind to and authenticate as the victim's account. This could lead to account takeover, enabling access to encrypted vault data and potentially escalating privileges within an organization.
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; Gain Privileges or Assume Identity
This weakness can allow an attacker to access resources which are not otherwise accessible without proper authentication.
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