CVE-2026-43638: Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import
Medium · CVSS 5.4 (CVSS 3.1)EPSS 0.19%, 8th percentilePublished Updated Assigner: VulnCheck
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.
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N · CWE-862
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
bitwarden: server
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 (opens in new tab)
- github.com/bitwarden/server/pull/7394 (opens in new tab)
- github.com/bitwarden/server/releases/tag/v2026.4.1 (opens in new tab)
- sanjokkarki.com.np/blog/bitwarden-import-org-bypass (opens in new tab)
- www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-ci… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)