CVE-2026-27801— Vaultwarden: 2FA Bypass on Protected Actions due to Faulty Rate Limit Enforcement
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I. Basic Information for CVE-2026-27801
Vulnerability Information
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Vulnerability Title
Vaultwarden: 2FA Bypass on Protected Actions due to Faulty Rate Limit Enforcement
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
过多认证尝试的限制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Vaultwarden 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vaultwarden是Daniel García个人开发者的一个用 Rust 编写的 Bitwarden 服务器 API 的替代实现。 Vaultwarden 1.34.3及之前版本存在安全漏洞，该漏洞源于执行受保护操作时可绕过双因素认证，可能导致获得账户认证访问权限的攻击者执行如访问用户API密钥或删除用户保险库等受保护操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| dani-garcia | vaultwarden | < 1.35.0 | - |
II. Public POCs for CVE-2026-27801
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · dani-garcia · 2026-03-04 · 4 CVEs total
| CVE-2026-27802 | 8.3 HIGH | Vaultwarden: Privilege Escalation via Bulk Permission Update to Unauthorized Collections b |
| CVE-2026-27803 | 8.3 HIGH | Vaultwarden: Collection Management Operations Allowed Without `manage` Verification for Ma |
| CVE-2026-27898 | 5.4 MEDIUM | Vaultwarden: Unauthorized Access via Partial Update API on Another User’s Cipher |
IV. Related Vulnerabilities
Same product: vaultwarden
- CVE-2026-33420
Vaultwarden missing authorization check allows Manager-role - CVE-2026-31835
Vaultwarden WebAuthn credential metadata tampered before sig - CVE-2026-27898
Vaultwarden: Unauthorized Access via Partial Update API on A - CVE-2026-27803
Vaultwarden: Collection Management Operations Allowed Withou - CVE-2026-27802
Vaultwarden: Privilege Escalation via Bulk Permission Update
Same vendor: dani-garcia
- CVE-2026-33420
Vaultwarden missing authorization check allows Manager-role - CVE-2026-31835
Vaultwarden WebAuthn credential metadata tampered before sig - CVE-2026-27898
Vaultwarden: Unauthorized Access via Partial Update API on A - CVE-2026-27803
Vaultwarden: Collection Management Operations Allowed Withou - CVE-2026-27802
Vaultwarden: Privilege Escalation via Bulk Permission Update
Same weakness: CWE-307
- CVE-2026-41893
Signal K Server's WebSocket Login Endpoint Lacks Rate Limiti - CVE-2025-2514
Improper Restriction of Excessive Authentication Attempts vu - CVE-2023-54347
OpenEMR 7.0.1 Authentication Brute Force Mitigation Bypass - CVE-2026-7671
CodeWise Tornet Scooter Mobile App TwoFactor excessive authe - CVE-2026-26206
Wazuh: API brute-force protection bypass via race condition
V. Comments for CVE-2026-27801
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