A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

History

Tue, 10 Feb 2026 01:45:00 +0000


Tue, 10 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Mon, 09 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak: cpe:/a:redhat:build_keycloak:26.2::el9
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 09 Feb 2026 19:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.
Title Org.keycloak.services.resources.organizations: keycloak: unauthorized organization registration via improper invitation token validation
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-347
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-02-10T01:00:57.599Z

Reserved: 2026-01-28T12:22:02.063Z

Link: CVE-2026-1529

cve-icon Vulnrichment

Updated: 2026-02-09T20:51:11.825Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-09T20:15:55.883

Modified: 2026-02-10T02:15:52.253

Link: CVE-2026-1529

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-09T18:21:00Z

Links: CVE-2026-1529 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses