CVE-2026-95503: Improper Verification of Cryptographic Signature

A flaw was found in the Kerberos federation provider of Keycloak, an open-source identity and access management solution. When Kerberos password authentication is used without SPNEGO, the system fails to verify the identity of the Key Distribution Center KDC by requesting a server ticket. This...

Security Bulletin: Impacted IBM Optim 1.0.0, 1.1.0 and 1.2.0 by vulnerabilities in netty-codec-http, Keycloak, LIBPNG

Summary IBM Optim versions 1.0.0, 1.1.0 and 1.2.0 include open-source packages netty-codec-http, Keycloak and LIBPNG that are affected by high-severity vulnerabilities. IBM Optim 2.0.0 resolves these vulnerabilities by upgrading the affected open-source dependencies to a fixed version...

CVE-2026-94215

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the reque...

CVE-2026-94217

A flaw was found in the User-Managed Access UMA implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one...

CVE-2026-94218

A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication 2FA setup, through a client policy. A user can bypass this...

CVE-2026-94213

A flaw was found in the Authorization Services component of Keycloak, an open-source identity and access management solution. The issue occurs in the policy evaluation endpoint, which is used by administrators to test how access policies apply to specific users. Due to missing authorization check...

CVE-2026-94218

A flaw in Keycloak's authentication session management allows a user to bypass mandatory 2FA setup enforcement configured via a client policy. During the login process, manually visiting a specific session restart web link clears internal markers that track required security steps, letting the us...

CVE-2026-94218 Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication session restart endpoint

A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication 2FA setup, through a client policy. A user can bypass this...

EUVD-2026-83846

A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication 2FA setup, through a client policy. A user can bypass this...

CVE-2026-94218 Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication session restart endpoint

A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication 2FA setup, through a client policy. A user can bypass this...

CVE-2026-94217 Keycloak-services: keycloak-services: uma scope merge across resource owners via resource name collision

A flaw was found in the User-Managed Access UMA implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one...

CVE-2026-94217 Keycloak-services: keycloak-services: uma scope merge across resource owners via resource name collision

A flaw was found in the User-Managed Access UMA implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one...

CVE-2026-94217

CVE-2026-94217 is a flaw in the User-Managed Access (UMA) implementation of Keycloak , specifically in the authorization token endpoint when processing permission tickets. When two different users own resources with the same name, the system incorrectly merges permissions from both resources when...

EUVD-2026-83845

A flaw was found in the User-Managed Access UMA implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one...

CVE-2026-94218

A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication 2FA setup, through a client policy. A user can bypass this...

CVE-2026-94215 Keycloak-services: keycloak-services: cross-realm client read/write via request-level cache missing realm ownership check

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the reque...

CVE-2026-94215 Keycloak-services: keycloak-services: cross-realm client read/write via request-level cache missing realm ownership check

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the reque...

CVE-2026-94215

Keycloak's Admin REST API contains a cross-realm privilege escalation flaw. The API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying realm ownership , allowing a limited-privilege administrator to read or modify client configurations in the master...

EUVD-2026-83841

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the reque...

CVE-2026-94217

A flaw was found in the User-Managed Access UMA implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one...