CVE-2026-18212: Missing Release of Memory after Effective Lifetime

A flaw was found in the SAML Redirect Binding implementation of Keycloak, an open-source identity and access management solution. The issue occurs because the custom DEFLATE compression and decompression helpers fail to release native zlib memory after use. An unauthenticated attacker can exploit...

CVE-2026-79651: Uncontrolled Resource Consumption

A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service responsible for authentication flows and theme management in Keycloak. The issue occurs because the system accepts arbitrary locale tags from unauthenticated requests and stores them...

PT-2026-93317

A flaw was found in the first broker login flow of Keycloak. When a user confirms an account-linking request from a different browser, a temporary proof is created to validate the link. However, this proof is not properly cleared after the link is established or when the user later manually remov...

PT-2026-93414

Name of the Vulnerable Software and Affected Versions apache-airflow-providers-keycloak versions prior to 0.10.0 Description The unauthenticated token endpoint accepts a client-credentials grant for any confidential client registered in the Keycloak realm, rather than restricting it to the client...

CVE-2026-19607: Improper Authentication

A flaw was found in the first-broker-login flow of the keycloak-services component. This component handles the initial authentication and account linking when a user logs in via an external identity provider. The issue allows an attacker to register a matching username on an external provider to...

PT-2026-93413

Name of the Vulnerable Software and Affected Versions Apache Airflow Keycloak provider versions 3.3 and later Description The Keycloak auth manager retrieves a user's identity from a signed Airflow session token but obtains Keycloak access and refresh tokens from separate, unauthenticated cookies...

CVE-2026-76186: Reliance on Cookies without Validation and Integrity Checking

Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user's identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two...

PT-2026-93803

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw exists in the theme localization endpoints of the keycloak-services component, which manages authentication flows and themes. The system accepts arbitrary locale tags from...

PT-2026-93784

Name of the Vulnerable Software and Affected Versions Jenkins Keycloak Authentication Plugin versions prior to 2.4.2 Description The plugin fails to restrict the redirect URL after the login process. This flaw allows attackers to redirect users to malicious sites, facilitating phishing attacks...

PT-2026-93820

Name of the Vulnerable Software and Affected Versions Keycloak versions prior to 26.7.4 Description A flaw exists where a user assigned the impersonation role can impersonate a realm administrator. This privilege escalation allows an attacker to obtain full administrative control over the realm,...

Open redirect vulnerability in keycloak

keycloak 2.4.1 and earlier does not restrict the redirect URL after login. This allows attackers to perform phishing attacks by having users go to a Jenkins URL that will forward them to a different site after successful authentication. keycloak 2.4.2 only redirects to relative Jenkins URLs...

CVE-2026-89298

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

CVE-2026-89298

A flaw in Keycloak 's Dynamic Client Registration service allows a user with the view-clients role to retrieve a client's confidential secret in cleartext via the client registration GET endpoint. The root cause is a failure to mask sensitive information when returning client details. A read-only...

CVE-2026-89298 Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

CVE-2026-89298 Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

EUVD-2026-76104

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

CVE-2026-89298

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

CVE-2026-89298: Exposure of Sensitive Information to an Unauthorized Actor

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

PT-2026-89870

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive...

CVE-2026-88770

A flaw was found in the Device Authorization Grant flow of Keycloak, an identity and access management solution. The issue occurs because the token redemption process fails to check if a user account is currently locked due to brute-force protection. If an attacker has an active session for a...