CVE-2026-27801 Vaultwarden: 2FA Bypass on Protected Actions due to Faulty Rate Limit Enforcement

What is CVE-2026-27801?

CVE-2026-27801 is a medium-severity vulnerability in dani-garcia vaultwarden, published on 4 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Vaultwarden versions 1.34.3 and prior are susceptible to a 2FA bypass when performing protected actions. An attacker who gains authenticated access to a user’s account can exploit this bypass to perform protected actions such as accessing the user’s API key or deleting the user’s vault and organisations the user is an admin/owner of . This issue has been patched in version 1.35.0.

Weakness: CWE-307

Which versions are affected by CVE-2026-27801?

2 open source packages ship an affected version, including vaultwarden. It affects 1 product.

Products include Dani-Garcia Vaultwarden.

How do I fix CVE-2026-27801?

Upgrade vaultwarden to 1.35.0 or later.

Is CVE-2026-27801 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27801 exists.

Other vulnerabilities in dani-garcia vaultwarden

• CVE-2024-55225 Vaultwarden vulnerable to user impersonation Critical 9.8
• CVE-2024-55224 Vaultwarden HTML injection vulnerability Critical 9.6
• CVE-2024-39924 Privilege escalation in n/a High 8.8
• CVE-2026-43912 Vaultwarden: Cross-Org Group Binding Enables Unauthorized Read And Write Access Into Another Organization High 8.7
• CVE-2026-27802 Vaultwarden: Privilege Escalation via Bulk Permission Update to Unauthorized Collections by Manager High 8.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-v6pg-v89r-w8wr.