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

CVE ID :CVE-2026-43911

Published : May 11, 2026, 11:20 p.m. | 2 hours, 37 minutes ago

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.

Severity: 6.8 | MEDIUM

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