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
| Link | Resource |
|---|---|
| https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 | Patch |
| https://github.com/bitwarden/server/pull/7394 | Issue Tracking Patch |
| https://github.com/bitwarden/server/releases/tag/v2026.4.1 | Release Notes |
| https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass | Exploit Third Party Advisory |
| https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import | Third Party Advisory |
Configurations
History
16 May 2026, 02:55
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Bitwarden server
Bitwarden |
|
| References | () https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 - Patch | |
| References | () https://github.com/bitwarden/server/pull/7394 - Issue Tracking, Patch | |
| References | () https://github.com/bitwarden/server/releases/tag/v2026.4.1 - Release Notes | |
| References | () https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass - Exploit, Third Party Advisory | |
| References | () https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import - Third Party Advisory | |
| CPE | cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:* |
11 May 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-11 18:16
Updated : 2026-05-16 02:55
NVD link : CVE-2026-43638
Mitre link : CVE-2026-43638
CVE.ORG link : CVE-2026-43638
JSON object : View
Products Affected
bitwarden
- server
CWE
CWE-862
Missing Authorization