CVE-2026-43638
MEDIUMBitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import
Title source: cnaDescription
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.
References (5)
Core 5
Core References
Exploit technical-description
exploit
https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass
Release Notes release-notes
https://github.com/bitwarden/server/releases/tag/v2026.4.1
Issue Tracking issue-tracking
https://github.com/bitwarden/server/pull/7394
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import
Scores
CVSS v3
5.4
EPSS
0.0019
EPSS Percentile
8.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-862
Status
published
Products (1)
bitwarden/server
< 2026.4.1 (2 CPE variants)
Published
May 11, 2026
Tracked Since
May 11, 2026