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

Quick assessment

Affected
dani-garcia vaultwarden
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 8.1 Difficulty: Easy EPSS 0.25% · P15
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
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

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III. Intelligence Information for CVE-2026-27801

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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
Same vendor: dani-garcia
Same weakness: CWE-307

V. Comments for CVE-2026-27801

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