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

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

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-02-09T20:51:17.932Z

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 : Received

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

Modified: 2026-02-09T21:15:48.653

Link: CVE-2026-1529

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses