CVE-2026-43638
Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import
- State
- Published
- Severity
- 5.3 Medium
- Published
- May 11, 2026
- Updated
- Jul 14, 2026
- Reserved
- May 1, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
serverbitwarden |
|
References
- https://sanjokkarki.com.np/blog/bitwarden-import-org-bypasstechnical-descriptionexploit
- https://github.com/bitwarden/server/releases/tag/v2026.4.1release-notes
- https://github.com/bitwarden/server/pull/7394issue-tracking
- https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758patch
- https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-importthird-party-advisory
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