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.
PoC: CVE-2026-1529-PoC-keycloak-unauthorized-registration-via-improper-invitation-token-validation
CVE-2026-1529 (PoC) is a critical vulnerability in Keycloak that allows unauthorized organization registration through improper invitation token validation. This exploit tool demonstrates the vulnerability by manipulating JWT tokens to register users in unauthorized organizations.
PoC: CVE-2026-1529-Keycloak-Exploit-Tool
Keycloak: Unauthorized organization registration via improper invitation token validation
PoC: CVE-2026-1529-PoC-keycloak-unauthorized-registration-via-improper-invitation-token-validation
CVE-2026-1529 (PoC) is a critical vulnerability in Keycloak that allows unauthorized organization registration through improper invitation token validation. This exploit tool demonstrates the vulnerability by manipulating JWT tokens to register users in unauthorized organizations.
PoC: CVE-2026-1529
Keycloak: Unauthorized organization registration via improper invitation token validation
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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