HOMEVULNERABILITIESCVE-2026-57521
MEDIUM

CVE-2026-57521

CWE-862Published: June 25, 2026· Updated: Jun 27, 2026

4.3
CVSS v3.1
EPSS:0.21%probability of exploitation in 30 daysPercentile:11.3th

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.

NVD Source

Technical Analysis

CVE-2026-57521 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

bitwarden1 product
server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://github.com/bitwarden/server/commit/0a3d9f9deb7d407503207b0d0ca8f0165a890bee
PATCHhttps://sanjokkarki.com.np/blog/bitwarden-preview-invoice-idor
ADVISORYhttps://www.vulncheck.com/advisories/bitwarden-server-broken-access-control-via-previewinvoicecontroller

All References (5)

→
https://github.com/bitwarden/server/commit/0a3d9f9deb7d407503207b0d0ca8f0165a890beePatch
→
https://github.com/bitwarden/server/pull/7583Issue Tracking
→
https://github.com/bitwarden/server/releases/tag/v2026.5.0Release Notes
→
https://sanjokkarki.com.np/blog/bitwarden-preview-invoice-idorExploit · Third Party Advisory · Patch
→
https://www.vulncheck.com/advisories/bitwarden-server-broken-access-control-via-previewinvoicecontrollerThird Party Advisory

Quick Facts

CVE IDCVE-2026-57521
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-862
CISA KEVNo
EPSS (30d)0.21%
Affected1 vendor
PublishedJun 25, 2026

Related CVEs (CWE-862)

CVE-2025-30416
10.0
CVE-2026-0092
10.0
CVE-2026-2031
10.0
CVE-2026-33712
10.0
CVE-2026-34976
10.0
CVE-2026-44442
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-57521 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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