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CVE-2026-96448

Keycloak-services: keycloak-services: fgap v2 composite-blind role mapping allows privilege escalation

A flaw was found in the Fine-Grained Admin Permissions (FGAP v2) feature of Keycloak, an identity and access management solution. The issue occurs when the system checks if a delegated administrator has permission to assign a specific role to a user. Because the check does not look inside composite roles to see what other permissions they contain, an administrator with limited rights can assign a role that secretly includes full administrative control. This allows the attacker to gain complete management access over the entire realm.

CVSS 3.1 · 6.6 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Red Hat Single Sign On and 1 more
CVE-2026-96446

Keycloak-services: keycloak-services: par single-use bypass via prompt=none silent authentication path

A flaw was found in the Pushed Authorization Request PAR implementation of Keycloak. The issue occurs when the silent authentication path prompt=none is used, which allows the authorization process to skip certain steps if a user is already logged in. Due to this bypass, the security rule that ensures a pushed request URI is used only once is not enforced. An attacker could potentially reuse a request URI to obtain multiple authorization codes for a user who is already signed in, violating security standards like FAPI-2.

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-2026-96445

Keycloak-services: keycloak-services: conditional otp skip-header policy evaluated against untrusted proxy headers

A flaw was found in the Conditional OTP authenticator of Keycloak, an identity and access management solution. The issue occurs when the system evaluates specific HTTP headers to determine if a one-time password (OTP) should be skipped, but fails to verify if those headers came from a trusted source. This could allow an attacker who already has a user's password to bypass the second-factor authentication by providing a specially crafted header in their request.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Red Hat Single Sign On and 1 more
CVE-2026-95503

Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled

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 allows an attacker on the same network to spoof the KDC and bypass the authentication process, potentially gaining unauthorized access to user accounts.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Red Hat Single Sign On and 1 more
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 information, the service returns the client's confidential secret in cleartext. This could allow a read-only administrator to obtain full access to the affected client's account and potentially escalate their privileges within the realm.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Red Hat Single Sign On
CVE-2026-88770

Keycloak-services: keycloak-services: device authorization grant issues tokens to brute-force-locked accounts

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 locked account, they can complete the device login process and receive new security tokens. This allows the attacker to maintain access to the account even when it should be temporarily disabled to prevent unauthorized entry.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Red Hat Single Sign On and 1 more
CVE-2026-82968

Keycloak-services: keycloak-services: cross-session email verification proof not bound to upstream identity for social providers

A flaw was found in the first-broker-login flow of the Keycloak identity management service. When a user links a social identity provider account to their local account, the verification proof generated is not strictly bound to the specific upstream identity being verified. This allows an attacker with a different account on the same social provider to intercept the process and link their own account to the victim's local profile, gaining unauthorized access.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Red Hat Single Sign On and 1 more
CVE-2026-93432

Io.quarkus.qute:quarkus-core: cross-site scripting (xss) and json injection via qute {#eval} section in quarkus

A flaw was found in the Quarkus Qute template engine. When the {#eval} section helper processes a sub-template, it fails to pass the parent template's content type information. This bypasses standard escaping mechanisms, allowing untrusted data to be output as raw, unescaped text. This vulnerability can lead to Cross-Site Scripting (XSS) and JSON Injection, potentially allowing a remote attacker to execute arbitrary code in a user's browser or manipulate data.

CVSS 3.1 · 6.1 Medium EPSS 1.2% KEV · Not listed
Vendors
Redhat
Products
Apache Camel Quarkus Apicurio Registry Build Keycloak and 9 more
CVE-2026-107912

Io.quarkus/quarkus-vertx-http: quarkus-vertx-http: authorization bypass in management interface via path concatenation flaw

A flaw was found in the management interface of the Quarkus framework, specifically within the quarkus-vertx-http component. The issue occurs when the framework incorrectly combines the management root path with specific permission rules, leading to a situation where security policies are applied to the wrong internal paths. As a result, an attacker can bypass intended authorization checks and gain unauthorized access to sensitive management endpoints.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Apicurio Registry Build Keycloak Camel Quarkus and 7 more
CVE-2026-10832

Org.wildfly.security/wildfly-elytron-asn1: unbounded memory allocation in wildfly elytron asn.1 derdecoder via crafted der payload

A flaw was found in the DERDecoder class within wildfly-elytron-asn1. A remote attacker can exploit this resource exhaustion vulnerability by sending a specially crafted DER (Distinguished Encoding Rules) payload. The decoder attempts to allocate excessive memory based on an inflated length value without proper validation, leading to Java Virtual Machine (JVM) memory exhaustion. This results in a remote Denial of Service (DoS) for services that process untrusted DER/ASN.1 input, including SASL (Simple Authentication and Security Layer) authentication mechanisms and X.500 certificate principal parsing paths.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Apache Camel Hawtio Build Keycloak Build Of Apache Camel - Hawtio and 20 more
CVE-2025-23367

Org.wildfly.core:wildfly-server: wildfly improper rbac permission

A flaw was found in the Wildfly Server Role Based Access Control (RBAC) provider. When authorization to control management operations is secured using the Role Based Access Control provider, a user without the required privileges can suspend or resume the server. A user with a Monitor or Auditor role is supposed to have only read access permissions and should not be able to suspend the server. The vulnerability is caused by the Suspend and Resume handlers not performing authorization checks to validate whether the current user has the required permissions to proceed with the action.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Jboss Bpms Jboss Data Grid and 5 more
CVE-2024-3884

Undertow: outofmemory when parsing form data encoding with application/x-www-form-urlencoded

A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows unauthorized users to cause a remote denial of service (DoS) attack.

CVSS 3.1 · 7.5 High EPSS 1.5% KEV · Not listed
Vendors
Redhat
Products
Amq Streams Apache Camel Hawtio Build Keycloak and 16 more
CVE-2024-12397

Io.quarkus.http/quarkus-http-core: quarkus http cookie smuggling

A flaw was found in Quarkus-HTTP, which incorrectly parses cookies with certain value-delimiting characters in incoming requests. This issue could allow an attacker to construct a cookie value to exfiltrate HttpOnly cookie values or spoof arbitrary additional cookie values, leading to unauthorized data access or modification. The main threat from this flaw impacts data confidentiality and integrity.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Amq Streams Apache Camel Hawtio Build Keycloak and 10 more
CVE-2024-1300

Io.vertx:vertx-core: memory leak when a tcp server is configured with tls and sni support

A vulnerability in the Eclipse Vert.x toolkit causes a memory leak in TCP servers configured with TLS and SNI support. When processing an unknown SNI server name assigned the default certificate instead of a mapped certificate, the SSL context is erroneously cached in the server name map, leading to memory exhaustion. This flaw allows attackers to send TLS client hello messages with fake server names, triggering a JVM out-of-memory error.

CVSS 3.1 · 5.4 Medium EPSS 1.1% KEV · Not listed
Vendors
Redhat
Products
A Mq Clients Amq Broker Amq Streams and 18 more
CVE-2024-1023

Io.vertx/vertx-core: memory leak due to the use of netty fastthreadlocal data structures in vertx

A vulnerability in the Eclipse Vert.x toolkit results in a memory leak due to using Netty FastThreadLocal data structures. Specifically, when the Vert.x HTTP client establishes connections to different hosts, triggering the memory leak. The leak can be accelerated with intimate runtime knowledge, allowing an attacker to exploit this vulnerability. For instance, a server accepting arbitrary internet addresses could serve as an attack vector by connecting to these addresses, thereby accelerating the memory leak.

CVSS 3.1 · 6.5 Medium EPSS 1.7% KEV · Not listed
Vendors
Redhat
Products
A Mq Clients Amq Broker Amq Streams and 18 more
CVE-2023-6717

Keycloak: xss via assertion consumer service url in saml post-binding flow

A flaw was found in the SAML client registration in Keycloak that could allow an administrator to register malicious JavaScript URIs as Assertion Consumer Service POST Binding URLs (ACS), posing a Cross-Site Scripting (XSS) risk. This issue may allow a malicious admin in one realm or a client with registration access to target users in different realms or applications, executing arbitrary JavaScript in their contexts upon form submission. This can enable unauthorized access and harmful actions, compromising the confidentiality, integrity, and availability of the complete KC instance.

CVSS 3.1 · 6 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Amq Broker Build Keycloak Jboss Bpms and 13 more
CVE-2024-2700

Quarkus-core: leak of local configuration properties into quarkus applications

A vulnerability was found in the quarkus-core component. Quarkus captures local environment variables from the Quarkus namespace during the application's build, therefore, running the resulting application inherits the values captured at build time. Some local environment variables may have been set by the developer or CI environment for testing purposes, such as dropping the database during application startup or trusting all TLS certificates to accept self-signed certificates. If these properties are configured using environment variables or the .env facility, they are captured into the built application, which can lead to dangerous behavior if the application does not override these values. This behavior only happens for configuration properties from the `quarkus.*` namespace. Application-specific properties are not captured.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Amq Streams Apache Camel Hawtio Apicurio Registry and 7 more
CVE-2025-23368

Org.wildfly.core:wildfly-elytron-integration: wildfly elytron brute force attack via cli

A flaw was found in Wildfly Elytron integration. The component does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks via CLI.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Camel K Data Grid and 8 more
CVE-2024-1635

Undertow: out-of-memory error after several closed connections with wildfly-http-client protocol

A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. Whenever a malicious user opens and closes a connection with the HTTP port of the server and then closes the connection immediately, the server will end with both memory and open file limits exhausted at some point, depending on the amount of memory available. At HTTP upgrade to remoting, the WriteTimeoutStreamSinkConduit leaks connections if RemotingConnection is closed by Remoting ServerConnectionOpenListener. Because the remoting connection originates in Undertow as part of the HTTP upgrade, there is an external layer to the remoting connection. This connection is unaware of the outermost layer when closing the connection during the connection opening procedure. Hence, the Undertow WriteTimeoutStreamSinkConduit is not notified of the closed connection in this scenario. Because WriteTimeoutStreamSinkConduit creates a timeout task, the whole dependency tree leaks via that task, which is added to XNIO WorkerThread. So, the workerThread points to the Undertow conduit, which contains the connections and causes the leak.

CVSS 3.1 · 7.5 High EPSS 4.6% KEV · Not listed
Vendors
Netapp Redhat
Products
Active Iq Unified Manager Oncommand Workflow Automation Amq Streams and 23 more
CVE-2024-1249

Keycloak: org.keycloak.protocol.oidc: unvalidated cross-origin messages in checkloginiframe leads to ddos

A flaw was found in Keycloak's OIDC component in the "checkLoginIframe," which allows unvalidated cross-origin messages. This flaw allows attackers to coordinate and send millions of requests in seconds using simple code, significantly impacting the application's availability without proper origin validation for incoming messages.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Amq Broker Amq Streams Build Keycloak and 12 more