CVE-2026-57521: Bitwarden Server < 2026.5.0 Broken Access Control via PreviewInvoiceController
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 endpoints without membership or authorization checks. Attackers can exploit the missing ManageOrganizationBillingRequirement on the preview invoice endpoints to retrieve Stripe-computed tax totals, subscription status, and billing details derived from any target organization's real customer and subscription data.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-57521?
CVE-2026-57521 has a severity rating of medium at 4.3.
How do I fix CVE-2026-57521?
To fix CVE-2026-57521, update your Bitwarden Server to version 2026.5.0 or later.
What is the impact of CVE-2026-57521?
CVE-2026-57521 allows authenticated users to access unauthorized organization billing data.
Who is affected by CVE-2026-57521?
Any organization using Bitwarden Server versions prior to 2026.5.0 is affected by CVE-2026-57521.
What components are involved in CVE-2026-57521?
CVE-2026-57521 specifically involves the PreviewInvoiceController endpoints in Bitwarden Server.