PT-2026-43682

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw in Keycloak, an open-source identity and access management solution, allows a remote attacker to manipulate the authentication process by crafting a special web address. This occurs...

PT-2026-43993

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description An authenticated user with low privileges can achieve privilege escalation by sending an oversized JSON Web Token JWT, which is a compact, URL-safe means of representing claims to be...

Keycloak 安全漏洞

Keycloak is an open-source identity and access management solution developed by Keycloak itself. There is a security vulnerability in Keycloak. This vulnerability arises when authenticated low-privilege users can send excessively large SubjectToken JWT tokens to the TokenEndpoint. When the token...

Keycloak 安全漏洞

Keycloak is an open-source identity and access management solution developed by Keycloak. There is a security vulnerability in Keycloak. This vulnerability arises when the client application’s configuration accepts broad redirect URIs. A remote attacker could manipulate the authentication process...

GHSA-M6QJ-3MPP-57V8 Keycloak: Insufficient verification proof scoping enables identity provider account linking attack and account compromise

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account...

Keycloak: Insufficient verification proof scoping enables identity provider account linking attack and account compromise

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account...

CVE-2026-9087

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account...

EUVD-2026-31134

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account...

CVE-2026-9087

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account...

CVE-2026-9087 Keycloak: cross-session email verification proof not bound to upstream identity in first-broker-login

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account...

CVE-2026-9087

CVE-2026-9087 : In Keycloak, the cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity actually verified, allowing a second upstream account on the same IdP to be linked to the victim’s local account. Affected component: Keycloak auth...

CVE-2026-9087

A flaw was found in Keycloak. The cross-session verification proof is keyed only by local userId, idpAlias and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account. Mitigation To...

Authorization Bypass Through User-Controlled Key

Overview org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services. Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the cross-session email verification process. An attacker...

Important: Red Hat Security Advisory: Red Hat build of Keycloak 26.4.12 Images Security Update

New images are available for Red Hat build of Keycloak 26.4.12 and Red Hat build of Keycloak 26.4.12 Operator, running on OpenShift Container Platform Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Ha...

org.keycloak/keycloak-services: Open redirect when using wildcard valid redirect URIs in Keycloak

A flaw was found in Keycloak's URL validation logic during redirect operations. By crafting a malicious request, an attacker could bypass validation to redirect users to unauthorized URLs, potentially leading to the exposure of sensitive information within the domain or facilitating further...

Important: Red Hat Security Advisory: Red Hat build of Keycloak 26.2.16 Security Update

New Red Hat build of Keycloak 26.2.16 packages are available from the Customer Portal Red Hat build of Keycloak 26.2.16 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security...

keycloak: Keycloak: Denial of Service via specially crafted SAML input

A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language SAML endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service DoS where the server becomes...

org.keycloak/keycloak-services: Session fixation in OIDC login flow that can lead to account takeover

A session fixation vulnerability was found in Keycloak's login-actions endpoints. An unauthenticated attacker could exploit this flaw by pre-creating an authentication session and tricking a victim into visiting a maliciously crafted link. By leveraging the /login-actions/restart endpoint—which...

keycloak-services: Blind Server-Side Request Forgery (SSRF) via HTTP Redirect Handling in Keycloak

A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended requests to internal or restricted resources...

keycloak: Keycloak: Unauthorized resource access and data modification via Insecure Direct Object Reference

A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference IDOR vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier UUID belonging to another Resource Server within the same realm,...