CVE-2026-16105

A flaw was found in the RoleContainerResource component of Keycloak. The issue occurs because certain name-based endpoints in the admin REST API do not properly enforce authorization checks when managing composite roles. This allows a delegated administrator with manage-realm permissions to remov...

EUVD-2026-51487

A flaw was found in the keycloak-services component of Keycloak, which handles OpenID Connect OIDC authentication flows. The issue occurs because the security check designed to prevent HTTP parameter pollution only inspects the query portion of a redirect URL and ignores the fragment portion. Whe...

CVE-2026-18209

CVE-2026-18209 impacts the Keycloak service, specifically the component handling OpenID Connect (OIDC) flows. The flaw: the security check to prevent HTTP parameter pollution only examines the query string of a redirect URL, ignoring the fragment. With a wildcard redirect URI, an attacker can in...

EUVD-2026-51486

A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain like .example.com to restrict which hosts can register or update clients. Due to improper validation, the...

CVE-2026-18206

A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain like .example.com to restrict which hosts can register or update clients. Due to improper validation, the...

CVE-2026-18206

CVE-2026-18206 affects Keycloak’s keycloak-services component. A realm administrator using a wildcard domain (for example, *.example.com) to restrict hosts that can register or update clients is bypassable due to improper validation: any hostname ending with the domain suffix is accepted even if ...

CVE-2026-18206 Keycloak-services: keycloak-services: client policy source-host wildcard domain matching bypass

A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain like .example.com to restrict which hosts can register or update clients. Due to improper validation, the...

CVE-2026-18209

A flaw was found in the keycloak-services component of Keycloak, which handles OpenID Connect OIDC authentication flows. The issue occurs because the security check designed to prevent HTTP parameter pollution only inspects the query portion of a redirect URL and ignores the fragment portion. Whe...

EUVD-2026-51484

A flaw was found in the group policy evaluation logic of Keycloak, an identity and access management solution. When a group policy is set to extend permissions to child groups, the system incorrectly uses a simple text-based prefix check to verify group membership. This allows a user who belongs ...

CVE-2026-18203 Keycloak-services: keycloak-services: group policy extendchildren matches sibling group path prefixes

A flaw was found in the group policy evaluation logic of Keycloak, an identity and access management solution. When a group policy is set to extend permissions to child groups, the system incorrectly uses a simple text-based prefix check to verify group membership. This allows a user who belongs ...

EUVD-2026-51485

Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This mean...

CVE-2026-18203

CVE-2026-18203 describes a flaw in Keycloak’s group policy evaluation logic: when a group policy is configured to extend permissions to child groups, the system uses a simple text-based prefix check to verify membership. This allows a user from a different group with a similar starting name to by...

CVE-2026-18214 Keycloak-services: keycloak-services: google external access-token exchange bypasses hosted-domain restriction

Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This mean...

CVE-2026-18206

A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain like .example.com to restrict which hosts can register or update clients. Due to improper validation, the...

CVE-2026-18211

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on client configurations, such as requiring encrypted connections for redirect URIs. Due to an improper check that only looks at the...

CVE-2026-18211

CVE-2026-18211 affects Keycloak core services, specifically the secure-client-uris policy executor. Affected component enforces security requirements on client configurations (e.g., redirect URIs) but contains an improper check that only inspects the start of a URL rather than validating the host...

EUVD-2026-51483

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on client configurations, such as requiring encrypted connections for redirect URIs. Due to an improper check that only looks at the...

CVE-2026-18211 Keycloak-services: keycloak-services: secure-client-uris policy bypass via localhost-prefixed domains

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on client configurations, such as requiring encrypted connections for redirect URIs. Due to an improper check that only looks at the...

CVE-2026-18214

Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This mean...

CVE-2026-18203

A flaw was found in the group policy evaluation logic of Keycloak, an identity and access management solution. When a group policy is set to extend permissions to child groups, the system incorrectly uses a simple text-based prefix check to verify group membership. This allows a user who belongs ...