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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 Patch
- https://github.com/bitwarden/server/pull/7394 Issue Tracking, Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · bitwardenNVD modified 2026-10-26 18:10
Affected (CPE criteria) 1
cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*
References 5
- 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