CVE-2026-27803— Vaultwarden: Collection Management Operations Allowed Without `manage` Verification for Manager Role
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I. Basic Information for CVE-2026-27803
Vulnerability Information
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Vulnerability Title
Vaultwarden: Collection Management Operations Allowed Without `manage` Verification for Manager Role
Source: NVD (National Vulnerability Database)
Vulnerability Description
Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, when a Manager has manage=false for a given collection, they can still perform several management operations as long as they have access to the collection. This issue has been patched in version 1.35.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
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 1.35.4之前版本存在安全漏洞，该漏洞源于Manager对特定集合manage=false时仍可执行多项管理操作，可能导致权限问题。
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 | < 1.35.4 | - |
II. Public POCs for CVE-2026-27803
| # | 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-2026-27898 | 5.4 MEDIUM | Vaultwarden: Unauthorized Access via Partial Update API on Another User’s Cipher |
| CVE-2026-27801 | Vaultwarden: 2FA Bypass on Protected Actions due to Faulty Rate Limit Enforcement |
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-2026-27802
Vaultwarden: Privilege Escalation via Bulk Permission Update - CVE-2026-27801
Vaultwarden: 2FA Bypass on Protected Actions due to Faulty R
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-2026-27802
Vaultwarden: Privilege Escalation via Bulk Permission Update - CVE-2026-27801
Vaultwarden: 2FA Bypass on Protected Actions due to Faulty R
Same weakness: CWE-269
- CVE-2026-42562
Plainpad: Privilege Escalation via Writable Admin Field in P - CVE-2026-41163
bubblewrap vulnerable to privilege escalation in setuid mode - CVE-2026-44987
SysReptor: Privilege Escalation from User Admin to Superuser - CVE-2026-42185
People: Privilege Escalation via Missing Role Ceiling in Mai - CVE-2026-40001
Local privilege escalation vulnerability in ZTE PROCESS Guar
V. Comments for CVE-2026-27803
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