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CVE-2026-43640— Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key

CVSS 8.1 · High EPSS 0.10% · P27

Possible ATT&CK Techniques 1AI

T1098.004 · SSH Authorized Keys

Affected Version Matrix 1

VendorProductVersion RangeStatus
bitwardenserver< 2026.4.1affected
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I. Basic Information for CVE-2026-43640

Vulnerability Information
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Vulnerability Title
Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
Source: NVD (National Vulnerability Database)
Vulnerability Description
Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.
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:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证算法的不正确实现
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，该漏洞源于检索或轮换组织SCIM API密钥时无需主密码重新认证，允许经过身份验证的用户仅使用有效会话获取密钥。
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-2026-43640

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III. Intelligence Information for CVE-2026-43640

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

CVE-2026-436398.0 HIGHBitwarden Server < 2026.4.0 Missing Authorization via Provider Clients
CVE-2026-436385.4 MEDIUMBitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

IV. Related Vulnerabilities

Same product: server
Same vendor: bitwarden
Same weakness: CWE-303

V. Comments for CVE-2026-43640

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