Medium severity5.4NVD Advisory· Published May 11, 2026· Updated May 16, 2026

CVE-2026-43638

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Bitwarden/Serverreferences3 versions
(expand)+ 2 more
- (no CPE)
- cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*range: <2026.4.1
- (no CPE)range: < v2026.4.1

Patches

Vulnerability mechanics

References

github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758nvdPatch
github.com/bitwarden/server/pull/7394nvdIssue TrackingPatch
sanjokkarki.com.np/blog/bitwarden-import-org-bypassnvdExploitThird Party Advisory
www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-importnvdThird Party Advisory
github.com/bitwarden/server/releases/tag/v2026.4.1nvdRelease Notes

News mentions

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cvss	0.351
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000