Search: CVE-2026-37979

CVE-2026-37979 is an access control vulnerability in Red Hat build of Keycloak 26.4 affecting the OpenID Connect (OIDC) token introspection endpoint. It allows any confidential client with valid credentials in the realm to bypass audience restrictions and retrieve sensitive token claims intended for other resource servers. This compromises the confidentiality of lightweight access tokens. The vulnerability has a CVSS score of 6.5 (medium severity). Red Hat has released updated Keycloak 26.4.12 packages addressing this and other security issues. No explicit patch details for this CVE alone are provided, but the advisory indicates that updating to version 26.