CVE-2026-43640

HIGH 8.1

Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-303
Vendor	bitwarden
Product	server
Published	May 11, 2026
Last Updated	May 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

bitwarden / server

0 < 2026.4.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

sanjokkarki.com.np: https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass github.com: https://github.com/bitwarden/server/releases/tag/v2026.4.1 github.com: https://github.com/bitwarden/server/pull/7403 github.com: https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083 vulncheck.com: https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key

Credits

Sanjok Karki