Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak itself. Keycloak has a security vulnerability. This vulnerability allows remote attackers with high privileges—such as domain administrators who configure malicious LDAP servers or attackers who disrupt...

PT-2026-44194

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw allows a remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol LDAP server or an attacker who has compromis...

CVE-2026-9801: Improper Validation of Specified Quantity in Input

A flaw was found in Keycloak. A remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol LDAP server or an attacker compromising an upstream LDAP server, could exploit this vulnerability. By sending a malformed LDAP password...

PT-2026-55123

A flaw was found in Keycloak. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted SOAP requests to the SAML ECP Security Assertion Markup Language Enhanced Client or Proxy endpoint with varying client IDs. By observing distinct faultstrings in the...

PT-2026-55095

A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect OIDC token with the 'organization' scope. This allows organization metadata to be disclosed in...

PT-2026-44193

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw in the Client-Initiated Backchannel Authentication CIBA flow allows an attacker with valid client credentials to bypass brute-force protection. When a user account is temporarily lock...

PT-2026-55154

A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication CIBA flow to bypass this...

CVE-2026-9798: Authentication Bypass by Primary Weakness

A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication CIBA flow to bypass this...

PT-2026-44187

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description An authenticated administrator possessing the manage-clients role can exploit a Time-of-check to time-of-use TOCTOU flaw—a race condition where a system checks a condition and then uses the...

Keycloak code issues and vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. Keycloak has code-related vulnerabilities. These vulnerabilities arise when the revokeRefreshToken=true setting is enabled, and persistent session storage is used. A server restart can reset the internal...

Keycloak buffer error vulnerability

Keycloak is an open-source identity and access management solution developed by Keycloak. Keycloak has a buffer error vulnerability, which originates from the ClientRegistrationAuth component. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. There is a security vulnerability in Keycloak. This vulnerability arises when user accounts are temporarily locked due to failed login attempts. Attackers with valid client credentials can exploit the revers...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. There is a security vulnerability in Keycloak. This vulnerability allows authenticated users with existing organizational membership to exploit it by accessing user-facing APIs or requesting OpenID Connect...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak itself. There is a security vulnerability in Keycloak. This vulnerability stems from the fact that authenticated administrators with the manage-clients role can exploit the vulnerability in the name-based...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. Keycloak has a security vulnerability, which stems from the possibility for remote, unauthenticated attackers to send specially crafted SOAP requests to the SAML ECP endpoint. These requests are accompanied ...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. Keycloak has a security vulnerability that stems from the org.keycloak.protocol.oidc component. When certain conditions are met, the reject-ropc-grant executor is silently bypassed, allowing unauthenticated...

Keycloak data falsification vulnerability

Keycloak is an open-source identity and access management solution developed by Keycloak itself. Keycloak has a data falsification vulnerability. This vulnerability arises when submitting JSON Web encrypted request objects, and if the decrypted content is the original JSON, Keycloak may improperl...

PT-2026-44195

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw exists when revokeRefreshToken=true is enabled and persistent session storage is utilized. A server restart can reset internal timing mechanisms, allowing a remote attacker who has...

PT-2026-55152

A flaw was found in Keycloak. An authenticated administrator with the manage-clients role can exploit a Time-of-check to time-of-use TOCTOU vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to realm-admin for all users within the realm,...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. There is a security vulnerability in Keycloak. This vulnerability stems from administrators with limited client management privileges being able to exploit the loophole in the fine-grained administrator...