CVE-2026-4630Network attack vector

Authenticated resource access via missing owner checks

Published May 19, 2026 · Updated May 19, 2026

Authorization bypass in Red Hat build of Keycloak 26.4 before 26.4.12 allows remote authenticated users to read, modify, or delete resources. ResourceService calls the resource-set service for a caller-supplied UUID without verifying that the token's resource server owns the object. Exploitation requires a valid protection token and a UUID belonging to another resource server in the same realm, exposing that server's resource data and management operations.

CVSS severity6.8
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Red Hat build of Keycloak 26.4 before 26.4.12 allows remote authenticated users to read, modify, or delete resources. ResourceService calls the resource-set service for a caller-supplied UUID without verifying that the token's resource server owns the object. Exploitation requires a valid protection token and a UUID belonging to another resource server in the same realm, exposing that server's resource data and management operations.

The record

CVE
CVE-2026-4630
Published
May 19, 2026
Updated
May 19, 2026
Vendor
389 Directory Server
Product
Red Hat build of Keycloak
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat build of KeycloakAffected versions are unavailable in this record.

Published CVSS scores

6.8Red HatCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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