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CVE-2026-43638— Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

CVSS 5.4 · Medium EPSS 0.03% · P8

Affected Version Matrix 1

VendorProductVersion RangeStatus
bitwardenserver< 2026.4.1affected
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I. Basic Information for CVE-2026-43638

Vulnerability Information
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Vulnerability Title
Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import
Source: NVD (National Vulnerability Database)
Vulnerability Description
Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
bitwarden 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
bitwarden是Bitwarden开源的一款密码管理后端服务。 Bitwarden 2026.4.1之前版本存在安全漏洞，该漏洞源于缺少授权检查，允许任何经过身份验证的用户通过提交空collections数组向任意组织写入密码。
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

VendorProductAffected VersionsCPESubscribe
bitwardenserver 0 ~ 2026.4.1 -

II. Public POCs for CVE-2026-43638

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III. Intelligence Information for CVE-2026-43638

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Same Patch Batch · bitwarden · 2026-05-11 · 3 CVEs total

CVE-2026-436408.1 HIGHBitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
CVE-2026-436398.0 HIGHBitwarden Server < 2026.4.0 Missing Authorization via Provider Clients

IV. Related Vulnerabilities

Same product: server
Same vendor: bitwarden
Same weakness: CWE-862

V. Comments for CVE-2026-43638

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