CVE-2026-57521Public exploitNetwork attack vector

Billing-data disclosure via missing endpoint authorization

Published Jun 25, 2026 · Updated Jun 25, 2026

Broken access control in Bitwarden Server before 2026.5.0 allows remote authenticated users to read arbitrary organization billing data. The plan-change and subscription-update actions in PreviewInvoiceController load the organizationId route value but omit ManageOrganizationBillingRequirement authorization before Stripe-backed invoice calculations. Any authenticated account, including a nonmember, can expose another organization's tax totals, subscription status, and billing details.

CVSS severity5.3
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in Bitwarden Server before 2026.5.0 allows remote authenticated users to read arbitrary organization billing data. The plan-change and subscription-update actions in PreviewInvoiceController load the organizationId route value but omit ManageOrganizationBillingRequirement authorization before Stripe-backed invoice calculations. Any authenticated account, including a nonmember, can expose another organization's tax totals, subscription status, and billing details.

The record

CVE
CVE-2026-57521
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Bitwarden
Product
Bitwarden Server
Classifications
CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bitwarden · Bitwarden Serverversion=0 <2026.5.0

Published CVSS scores

5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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