GitHub Advisoryadvisory · Maven
GHSA-hcvw-475w-8g7p Keycloak affected by improper invitation token validation
HIGH
Official page ↗
- Aliases
- CVE-2026-1529
- Ecosystem
- Maven
- Packages
- org.keycloak:keycloak-services
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-347
- Reviewed
- 2026-02-10
Affected packages
• Maven org.keycloak:keycloak-services: >= 26.5.0, < 26.5.3 → fixed in 26.5.3
• Maven org.keycloak:keycloak-services: < 26.2.13 → fixed in 26.2.13
• Maven org.keycloak:keycloak-services: >= 26.3.0, < 26.4.9 → fixed in 26.4.9
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.
Related
Alias · CVE (1)
- CVE-2026-1529 A flaw was found in Keycloak. vulnerability
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-1529 advisory
- https://github.com/keycloak/keycloak/issues/46145 web
- https://github.com/keycloak/keycloak/pull/46155 web
- https://github.com/keycloak/keycloak/commit/82cd7941d1dd28fa14a67a6e6b912301f1a5e1a1 web
- https://github.com/keycloak/keycloak/commit/8fc9a98026106a326f4faa98d4c9a48341ace2d7 web
- https://github.com/keycloak/keycloak/commit/b2519756487b519f95c07aa8b10afe003e492119 web
- https://access.redhat.com/errata/RHSA-2026:2363 web
- https://access.redhat.com/errata/RHSA-2026:2364 web
- https://access.redhat.com/errata/RHSA-2026:2365 web
- https://access.redhat.com/errata/RHSA-2026:2366 web
- https://access.redhat.com/security/cve/CVE-2026-1529 web
- https://bugzilla.redhat.com/show_bug.cgi?id=2433783 web
- https://github.com/keycloak/keycloak package