Vulnerability · Published May 11, 2026 · Assigned by GitHub_M
CVE-2026-43911Vaultwarden: Refresh tokens not invalidated on security stamp rotation
Medium 6.8
In plain English
A medium-severity security flaw in vaultwarden from dani-garcia. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| dani-garcia | vaultwarden | < 1.35.5 |
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N