High 8.1Published Feb 9, 2026

CVE-2026-1529Org.keycloak.services.resources.organizations: keycloak: unauthorized organization registration via improper invitation token validation

Updated under an hour ago (Oct 27, 2026, 1:40 PM ET)

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It affects Red Hat build of Keycloak 26.2. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat build of Keycloak 26.2

Exploited in the last 30 days

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.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-347
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Deferred
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat build of Keycloak 26.2 redhat:build_keycloak	from 26.2.13-1 not affected	CNA record
Red Hat Red Hat build of Keycloak 26.2 redhat:build_keycloak	from 26.2.13-1 not affected	CISA ADP

References

References

https://access.redhat.com/errata/RHSA-2026:2363	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:2364	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:2365	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:2366	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-1529	vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2433783	issue-tracking, x-refsource-redhat
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1529.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.