What is CVE-2026-57521?

CVE-2026-57521 is a medium-severity vulnerability in Bitwarden Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-06-25.

How severe is CVE-2026-57521?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Bitwarden Server

CVE-2026-57521

Bitwarden Server before 2026.5.0 contains a broken access control vulnerability that allows any authenticated user to access arbitrary organization billing data by supplying an arbitrary organizationId to the PreviewInvoiceController endpo…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Bitwarden Server — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

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-2026-57521?: CVE-2026-57521 is a medium-severity vulnerability in Bitwarden Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-06-25.
How severe is CVE-2026-57521?: Medium severity. CVSS v3 base score is 4.3 out of 10.