8.1
High
CVE-2026-1529 A flaw was found in Keycloak
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Build of Keycloak | Versions not published | |
| Red Hat build of Keycloak 26.2 26.2 | earliest → < 26.2-15 | 26.2-15 |
| Red Hat build of Keycloak 26.2.13 | Versions not published | |
| Red Hat build of Keycloak 26.4 26.4 | earliest → < 26.4-10 | 26.4-10 |
| Red Hat build of Keycloak 26.4.9 | Versions not published |
References
- RHSA-2026:2363 access.redhat.com
- RHSA-2026:2364 access.redhat.com
- RHSA-2026:2365 access.redhat.com
- RHSA-2026:2366 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2433783 bugzilla.redhat.com
Timeline
- Published
- Last modified
Other CVEs of Red Hat Build of Keycloak
The 276 CVEs of Red Hat Build of Keycloak →
CVE-2026-9797
Keycloak: keycloak: privilege escalation via client authentication manipulation by an authenticated administrator
6.5
Medium
CVE-2026-97848
Keycloak-services: keycloak-services: protocol mapper with jsontype=json bypasses token sanitization
6.5
Medium
CVE-2026-97367
Keycloak-services: keycloak-services: dcr azp and sid claim substitution allows account rest session takeover
6.4
Medium
CVE-2026-96547
Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles
6.5
Medium