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.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected products
- bitwarden / server0 – 2026.4.1
References
- MISChttps://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass
- PATCHhttps://github.com/bitwarden/server/releases/tag/v2026.4.1
- PATCHhttps://github.com/bitwarden/server/pull/7403
- PATCHhttps://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key