CVE-2024-1132

Keycloak: path transversal in redirection validation

A flaw was found in Keycloak, where it does not properly validate URLs included in a redirect. This issue could allow an attacker to construct a malicious request to bypass validation and access other URLs and sensitive information within the domain or conduct further attacks. This flaw affects any client that utilizes a wildcard in the Valid Redirect URIs field, and requires user interaction within the malicious URL.

CVSS 3.1 · 8.1 High EPSS 1.6% KEV · Not listed

Vendors

Redhat

Products

Amq Broker Build Keycloak Build Of Keycloak and 20 more

CVE-2023-6291

Keycloak: redirect_uri validation bypass

A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Enterprise Linux Jboss Bpms and 15 more

CVE-2023-5685

Xnio: stackoverflowexception when the chain of notifier states becomes problematically big

A flaw was found in XNIO. The XNIO NotifierState that can cause a Stack Overflow Exception when the chain of notifier states becomes problematically large can lead to uncontrolled resource management and a possible denial of service (DoS).

CVSS 3.1 · 7.5 High EPSS 3.5% KEV · Not listed

Vendors

Redhat

Products

Apache-camel-spring-boot Apache Camel Hawtio Build Keycloak and 9 more

CVE-2024-7885

Undertow: improper state management in proxy protocol parsing causes information leakage

A vulnerability was found in Undertow where the ProxyProtocolReadListener reuses the same StringBuilder instance across multiple requests. This issue occurs when the parseProxyProtocolV1 method processes multiple requests on the same HTTP connection. As a result, different requests may share the same StringBuilder instance, potentially leading to information leakage between requests or responses. In some cases, a value from a previous request or response may be erroneously reused, which could lead to unintended data exposure. This issue primarily results in errors and connection termination but creates a risk of data leakage in multi-request environments.

CVSS 3.1 · 7.5 High EPSS 2.6% KEV · Not listed

Vendors

Redhat

Products

Apache Camel Hawtio Apache Camel Spring Boot Build Keycloak and 18 more

CVE-2026-118947

Keycloak-services: keycloak-services: authorization bypass via uma resource registration idor

A flaw was found in the UMA resource registration endpoint of the keycloak-services component, which provides the core logic for Keycloak's authorization and identity services. The issue occurs when remote resource management is enabled, allowing an authenticated user with specific permissions to update resources they do not own by providing a target resource ID in a request. This can lead to unauthorized modification of resource configurations, such as names, URIs, and scopes.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2026-120971

Org.jboss.resteasy/resteasy-core: resteasy: information disclosure through default exception mapper responses

A flaw was found in RESTEasy's default exception mapper. When an unhandled exception other than a WebApplicationException is not handled by an application exception mapper, RESTEasy returns the exception's localized message in the HTTP 500 response body. A remote unauthenticated attacker who can trigger such an exception may obtain information contained in that message. The behavior was reproduced with RESTEasy 7.0.2.Final.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Apicurio Registry Build Keycloak Camel Quarkus and 6 more

CVE-2026-118959

Keycloak-services: keycloak-services: required actions bypassed via kc_action parameter

A flaw was found in the required action provider mechanism of Keycloak. The issue occurs when an authorization request includes the kc_action query parameter set to a mandatory action already assigned to the user, such as profile verification or terms and conditions. Due to incorrect handling of application-initiated actions, Keycloak may skip these mandatory challenges and issue an authorization code. This can allow a user to bypass administrative requirements and gain access to the application without completing necessary profile updates or agreeing to terms.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2026-117627

Keycloak-services: keycloak-services: jwt authorization grant bypasses identity provider login restrictions

A flaw was found in the JWT Authorization Grant implementation of the keycloak-services component. When an OIDC or Google identity provider is configured with specific login restrictions, such as claim filtering, these checks are correctly applied during standard browser logins but are skipped during the JWT-based grant flow. This allows an authenticated client to obtain access tokens for a user even if their identity provider claims should have blocked the login.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2026-118425

Keycloak-services: keycloak-services: redirect uri domain allowlist bypass via dns resolution to loopback

A flaw was found in the secure-redirect-uris-enforcer client policy of Keycloak, an identity and access management solution. The issue occurs when the policy is configured to allow loopback addresses, as Keycloak resolves hostnames via DNS during validation. An attacker can bypass domain allowlist restrictions by using a hostname that resolves to a loopback address, potentially allowing the registration of unauthorized redirect URIs.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2026-117688

Keycloak-services: keycloak-services: vault secret disclosure via client registration installation configuration

A flaw was found in the client registration component of Keycloak, an open-source identity and access management solution. When a vault provider is used to store sensitive information, an authenticated client owner can use a specially crafted reference to trick the system into revealing secrets. By updating a client secret to point to a vault entry and then requesting the client configuration, the owner can see the secret value in plain text. This could lead to the exposure of sensitive credentials that the user should not be able to access.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2025-11537

Keycloak-services: sensitive headers shown in the http access logs

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

CVSS 3.1 · 5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak

CVE-2026-118030

Keycloak-services: keycloak-services: hotp race condition allows single otp code reuse across concurrent logins

A flaw was found in the HOTP authentication mechanism of the keycloak-services component, which provides identity and access management services. The issue occurs because the system validates a one-time password and updates its internal counter in two separate steps without proper locking. An attacker with a users password could exploit this timing gap to use a single one-time code to log in multiple times simultaneously.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2026-117859

Keycloak-services: keycloak-services: par single-use bypass via flow restart

A flaw was found in the Pushed Authorization Request PAR implementation of the keycloak-services component. The issue occurs when an authentication flow is restarted, which incorrectly clears the internal markers used to track PAR consumption while leaving the request active. This allows an attacker to reuse the same authorization request to obtain multiple access tokens, bypassing security requirements for single-use requests.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more

CVE-2026-87743

Quarkus-vertx-http: authorization bypass via path normalization discrepancy in quarkus http security

A flaw was found in Quarkus HTTP security. An unauthenticated attacker can exploit a discrepancy in how paths are normalized between the security matcher and HTTP request dispatchers. This allows the attacker to craft a URL that the security matcher considers public, but which is then routed to a protected endpoint, leading to an authorization bypass and potential unauthorized access to sensitive information.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Red Hat Openshift Ai (rhoai) Apicurio Registry Build Keycloak and 16 more

CVE-2026-37979

Keycloak: keycloak: information disclosure via oidc token introspection endpoint audience bypass

A flaw was found in Keycloak. This access control vulnerability in Keycloak's OpenID Connect (OIDC) token introspection endpoint allows a confidential client to bypass audience restrictions. An attacker-controlled client with valid credentials can retrieve sensitive token claims intended for other resource servers, compromising the confidentiality of lightweight access tokens. This issue can be exploited remotely by any confidential client in the realm with valid credentials.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak

CVE-2026-114438

Keycloak-services: keycloak-services: required otp enrollment bypassed via update user locale required action ordering

A flaw was found in the Update User Locale required action of the Keycloak identity and access management solution. When this action is ordered before the Configure OTP action in a realm, the system may fail to enforce mandatory multi-factor authentication enrollment during the login process. This issue allows an attacker with a valid password to access an account without setting up the required one-time password (OTP) credential.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak Red Hat Single Sign On and 1 more

CVE-2026-4633

Keycloak: keycloak: user enumeration via differential error messages

A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. This vulnerability allows an attacker to determine the existence of users, leading to information disclosure through user enumeration.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak

CVE-2026-0976

Org.keycloak/keycloak-quarkus-server: keycloak: proxy bypass due to improper handling of matrix parameters in url paths

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. This could expose administrative or sensitive endpoints that operators believe are not externally reachable.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Jboss Enterprise Application Platform Jbosseapxp

CVE-2026-4629

Keycloak: keycloak: privilege escalation through hardcoded role mapper injection

A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability by injecting a hardcoded role mapper into any client. This action allows the user to bypass existing scope restrictions and inject the `realm-admin` role into generated tokens, resulting in privilege escalation and full administrative access to the realm.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak

CVE-2026-4628

Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access control

A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak Jboss Enterprise Application Platform and 5 more