CVE-2026-47158: vaultwarden < 1.36.0

Affected technology

vaultwarden · < 1.36.0
dani-garcia

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

The source says prior to 1.36.0, Vaultwarden's SSO authorization flow did not bind the OAuth state parameter accepted by /connect/authorize to the initiating browser session, allowed attacker-controlled PKCE parameters, and left SsoAuth records intact after failed token exchange, allowing an unauthenticated attacker to induce IdP authentication and redeem tokens for a fully authenticated session. Vendor/CNA’s CVSS 3.1 assessment (base score 8.3/10) rates confidentiality impact as low; integrity and availability impact as high.