CVE-2026-47158CWE-352

Vaultwarden: CSRF in SSO Authorization Flow

High · published July 15, 2026

CVSS v3.1
8.3
EPSS
0%
Percentile
15.8
In the wild
Unconfirmed
What it is

Vaultwarden is a Bitwarden-compatible server written in Rust. 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. This issue is fixed in version 1.36.0.

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00252 · 15.8th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-07-15T15:01Z
EPSS history
Timeline
  • 15 JUL 15:01Z
    Vaultwarden: CSRF in SSO Authorization Flow
    cvelistv5