CVE-2026-47164
Vaultwarden: SSO Email Auto-Link Can Bind an Existing Local Account to an Attacker-Controlled IdP Identity
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.
INFO
Published Date :
July 15, 2026, 3:03 p.m.
Last Modified :
July 15, 2026, 3:03 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Solution
- Update Vaultwarden to version 1.36.0.
- Verify SSO configuration and user mappings.
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