Threats Tagged 'cve-2026-37981'

CVE-2026-37981 is a medium severity vulnerability in Red Hat build of Keycloak 26.4 that involves broken access control in the Account Resources user lookup endpoint. It allows a remote authenticated user who owns at least one User-Managed Access (UMA) resource to enumerate and harvest personally identifiable information (PII) of all users in the realm by sending crafted requests with arbitrary usernames or email values. Red Hat has released an updated package, Keycloak 26.4.12, that addresses this vulnerability along with others. Users are advised to back up their installations and apply the update. No known exploits are reported in the wild at this time.

Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Hat build of Keycloak for OpenShift image provides an authentication server that you can use to log in centrally, log out, and register. You can also manage user accounts for web applications, mobile applications, and RESTful web services. Red Hat build of Keycloak Operator for OpenShift simplifies deployment and management of Keycloak 26.4.12 clusters. This erratum releases new images for Red Hat build of Keycloak 26.4.12 for use within the OpenShift Container Platform cloud computing Platform-as-a-Service (PaaS) for on-premise or private cloud deployments, aligning with the standalone product release. Security fixes: * Denial of Service via specially crafted SAML input (CVE-2026-7307) * Information Disclosure via evaluate-scopes Admin API (CVE-2026-37978) * Unauthorized account takeover via WebAuthn token replay (CVE-2026-37982) * Information disclosure via OIDC token introspection endpoint audience bypass (CVE-2026-37979) * Access token disclosure and implicit flow bypass via forged client data (CVE-2026-7571) * Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507) * Open redirect when using wildcard valid redirect URIs in Keycloak (CVE-2026-7504) * Information disclosure via broken access control in user lookup endpoint (CVE-2026-37981) * Unauthorized resource access and data modification via Insecure Direct Object Reference (CVE-2026-4630)