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CVE-2026-1529

Org.keycloak.services.resources.organizations: keycloak: unauthorized organization registration via improper invitation token validation PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Red Hat / Red Hat build of Keycloak 26.2unaffected 26.2.13-1 before *
Red Hat / Red Hat build of Keycloak 26.2unaffected 26.2-15 before *
Red Hat / Red Hat build of Keycloak 26.2unaffected 26.2-15 before *
Red Hat / Red Hat build of Keycloak 26.2.13unaffected
Red Hat / Red Hat build of Keycloak 26.4unaffected 26.4.9-1 before *
Red Hat / Red Hat build of Keycloak 26.4unaffected 26.4-11 before *
Red Hat / Red Hat build of Keycloak 26.4unaffected 26.4-10 before *
Red Hat / Red Hat build of Keycloak 26.4.9unaffected

CWE

CWE-347

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

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.