---
id: CVE-2026-43638
title: >-
  Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher
  Import
summary: >-
  Bitwarden Server prior to v2026.4.1 contains a missing authorization
  vulnerability that allows any authenticated user to write ciphers into an
  arbitrary organization via `POST /ciphers/import-organization` by submitting
  an empty `collect…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: bitwarden
product: server
affected:
  - server < 2026.4.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-05-11T18:21:18.289415Z'
exploitAvailable: true
published: '2026-05-11'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:03:30.271Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43638'
references:
  - url: 'https://sanjokkarki.com.np/blog/bitwarden-import-org-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/7394'
  - url: >-
      https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758
  - url: >-
      https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import
tags:
  - cve.org
  - exploit-available
epss: 0.00188
epssPercentile: 0.08493
ingestedAt: '2026-11-08T14:51:22.428Z'
---

## Overview

Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.

## Affected

- `server < 2026.4.1`

## Remediation

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