CVE-2026-43911 Vaultwarden: Refresh tokens not invalidated on security stamp rotation
Attackers can maintain session access using old refresh tokens after security-sensitive operations like password changes, bypassing intended session invalidation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43911?
CVE-2026-43911 is a medium-severity vulnerability in dani-garcia vaultwarden, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-613
Which versions are affected by CVE-2026-43911?
It affects 1 product.
Products include Dani-Garcia Vaultwarden.
How do I fix CVE-2026-43911?
No fix has been published for CVE-2026-43911 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-43911 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43911 exists.
Other vulnerabilities in dani-garcia vaultwarden
- CVE-2024-55225 Vaultwarden vulnerable to user impersonation
- CVE-2024-55224 Vaultwarden HTML injection vulnerability
- CVE-2024-39924 Privilege escalation in n/a
- CVE-2026-43912 Vaultwarden: Cross-Org Group Binding Enables Unauthorized Read And Write Access Into Another Organization
- CVE-2026-27802 Vaultwarden: Privilege Escalation via Bulk Permission Update to Unauthorized Collections by Manager
Sources
Also known as GHSA-6j4w-g4jh-xjfx.