Vulnerability · Published Jun 25, 2026 · Assigned by VulnCheck

CVE-2026-57521Bitwarden Server < 2026.5.0 Broken Access Control via PreviewInvoiceController

Medium 4.3

In plain English

A medium-severity missing authorization in server from bitwarden. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 62.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
bitwarden	server	0 – before 2026.5.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://sanjokkarki.com.np/blog/bitwarden-preview-invoice-idor technical-description, exploit
https://github.com/bitwarden/server/releases/tag/v2026.5.0 release-notes
https://github.com/bitwarden/server/pull/7583 issue-tracking
https://github.com/bitwarden/server/commit/0a3d9f9deb7d407503207b0d0ca8f0165a890bee patch
https://www.vulncheck.com/advisories/bitwarden-server-broken-access-control-via-previewinvoicecontroller third-party-advisory