CVE-2026-47159Public exploitNetwork attack vector

Unauthenticated organization enumeration via SSO membership lookup

Published Jul 15, 2026 · Updated Jul 15, 2026

Improper authentication in Vaultwarden before 1.36.0 allows remote attackers to enumerate SSO organizations via public endpoints. The organization-discovery handler looks up memberships for an arbitrary email and returns real organization names and UUID identifiers; pre-validation then issues a JWT from a supplied identifier without proving control of that address. Any network client can reach the flow, but disclosure requires an SSO-enabled organization and full account takeover is not established.

CVSS severity6.9
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Vaultwarden before 1.36.0 allows remote attackers to enumerate SSO organizations via public endpoints. The organization-discovery handler looks up memberships for an arbitrary email and returns real organization names and UUID identifiers; pre-validation then issues a JWT from a supplied identifier without proving control of that address. Any network client can reach the flow, but disclosure requires an SSO-enabled organization and full account takeover is not established.

The record

CVE
CVE-2026-47159
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Dani Garcia
Product
Vaultwarden
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=< 1.36.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dani Garcia · Vaultwardenversion=< 1.36.0

Published CVSS scores

6.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication

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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