Vulnerability in Bitwarden Server
CVE-2026-43640
Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only…
EPSS: 0.001 (32.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Bitwarden Server — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit)
- disclosure@vulncheck.com (release-notes, Release Notes)
- disclosure@vulncheck.com (issue-tracking, Patch, Issue Tracking)
- disclosure@vulncheck.com (Patch, patch)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-43640?
- CVE-2026-43640 is a high-severity vulnerability in Bitwarden Server, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 8.1/10. Published 2026-05-11.
- How severe is CVE-2026-43640?
- High severity. CVSS v3 base score is 8.1 out of 10.