CVE-2026-43640 HIGH

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

Vendor Bitwarden
Product server
Weakness CWE-303
Published May 11, 2026
Last update May 13, 2026
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 11, 2026 CVE published
May 13, 2026 Record updated