Auth bypass in Bitwarden Server
CVE-2026-57520
Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custom users with ManageUsers permission to remove Admin accounts from an organization by exploiting a missing role hierarchy check in…
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L.
Affected products
- Bitwarden Server — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description, exploit)
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-57520?
- CVE-2026-57520 is a high-severity vulnerability in Bitwarden Server, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-06-25.
- How severe is CVE-2026-57520?
- High severity. CVSS v3 base score is 7.1 out of 10.