CVE-2026-27801CWE-307

Vaultwarden: 2FA Bypass on Protected Actions due to Faulty Rate Limit Enforcement

Medium · published March 4, 2026

CVSS v4.0
6.0
EPSS
0%
Percentile
16.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.0 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00259 · 16.6th percentile
Weakness
CWE-307 · Improper Restriction of Excessive Authentication Attempts
Published
2026-03-04T21:32Z
EPSS history
Timeline
  • 04 MAR 21:32Z
    Vaultwarden: 2FA Bypass on Protected Actions due to Faulty Rate Limit Enforcement
    cvelistv5