CVE-2026-47164 Vaultwarden: SSO Email Auto-Link Can Bind an Existing Local Account to an Attacker-Controlled IdP Identity
Attackers can hijack existing local accounts by binding them to attacker-controlled SSO identities when email matching is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47164?
CVE-2026-47164 is a high-severity authentication bypass vulnerability in dani-garcia vaultwarden, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's SSO login flow checked the IdP email_verified claim only for new-user creation and not when SSO_SIGNUPS_MATCH_EMAIL=true linked an IdP identity to an existing local account, allowing an attacker-controlled IdP identity asserting a victim email address to bind to and authenticate as that account. This issue is fixed in version 1.36.0.
Weakness: CWE-284
Which versions are affected by CVE-2026-47164?
How do I fix CVE-2026-47164?
No fix has been published for CVE-2026-47164 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-47164 being exploited?
There is no known exploitation of CVE-2026-47164 in the wild and no public exploit code.
Sources
Also known as GHSA-6x5c-84vm-5j56.