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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Bitwarden Server
cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*
|
— |
2026.5.0
|
References 5
https://github.com/bitwarden/server/commit/0a3d9f9deb7d407503207b0d0ca8f0165a89…
disclosure@vulncheck.com
https://github.com/bitwarden/server/pull/7583
disclosure@vulncheck.com
https://github.com/bitwarden/server/releases/tag/v2026.5.0
disclosure@vulncheck.com
https://sanjokkarki.com.np/blog/bitwarden-preview-invoice-idor
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/bitwarden-server-broken-access-control-via…
disclosure@vulncheck.com