CVE-2026-43638: bitwarden server

Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

CVSS 5.3 MediumEPSS 0.0019 · 8th percentile

Published by the CVE Program (CNA: VulnCheck) at 11 May 2026, 17:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
bitwarden	server pkg:github/bitwarden/server	affected before 2026.4.1 semver Other versions: affected

Identifiers

CVE-2026-43638

CNA

VulnCheck

Weakness (CWE)

CWE-862

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	4.0	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	CNA (VulnCheck)Used for this record
5.4	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0019, the 8th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

11 May 2026, 17:13 UTC Confirmed by the CVE List

Sources

References from the CNA

github.com/bitwarden/server/releases/tag/v2026.4.1 release-notes
github.com/bitwarden/server/pull/7394 issue-trackingpatch
github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758 patch
www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import third-party-advisory
sanjokkarki.com.np/blog/bitwarden-import-org-bypass technical-descriptionexploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.