---
id: CVE-2026-43640
title: Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
summary: >-
  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 onl…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-303
vendor: bitwarden
product: server
affected:
  - server < 2026.4.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-05-13T12:38:55.932890Z'
exploitAvailable: true
published: '2026-05-11'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:03:31.946Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43640'
references:
  - url: 'https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass'
  - url: 'https://github.com/bitwarden/server/releases/tag/v2026.4.1'
    label: server 2026.4.1 Release Notes
  - url: 'https://github.com/bitwarden/server/pull/7403'
  - url: >-
      https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083
  - url: >-
      https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key
tags:
  - cve.org
  - exploit-available
epss: 0.00504
epssPercentile: 0.43338
ingestedAt: '2026-11-08T14:51:22.427Z'
---

## Overview

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.

## Affected

- `server < 2026.4.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.