CVE-2026-43911 MEDIUM

CVE-2026-43911: Vaultwarden: Refresh tokens not invalidated on security stamp rotation

Vendor Dani-Garcia
Product vaultwarden
Weakness CWE-613 · Insufficient session expiration
Published May 11, 2026
Last update May 12, 2026

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, refresh tokens are not invalidated when the user's security_stamp is rotated by some security-sensitive operations (password change, KDF change, key rotation, email change, org admin password reset, emergency access takeover). This allows an attacker holding a previously obtained refresh token to maintain session access even after the user has taken action to secure their account. This vulnerability is fixed in 1.35.5.

Key dates

02Disclosure timeline

May 11, 2026 CVE published
May 12, 2026 Record updated