Keycloak: Policy bypass during WebAuthn credential registration via client-side JavaScript manipulation

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction fails to validate that the newly created credential's parameters, such as public key...

CVE-2026-8830

Technical details (affected product/version, root cause specifics, impact, or remediation) are not publicly available in the provided documents; monitor for updates.

EUVD-2026-30841

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction fails to validate that the newly created credential's parameters, such as public key...

CVE-2026-8830

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction fails to validate that the newly created credential's parameters, such as public key...

CVE-2026-8830

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction fails to validate that the newly created credential's parameters, such as public key...

CVE-2026-37982: Authentication Bypass by Capture-replay

A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay ExecuteActionsActionToken tokens within Keycloak's WebAuthn Web Authentication flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak itself. Keycloak has a security vulnerability, which stems from the server’s processAction function not verifying the new credential parameters. This could lead to the creation of non-compliant credentials by...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak itself. Keycloak has a security vulnerability, which stems from an authentication flaw in the WebAuthn process. This flaw allows remote attackers to reissue the ExecuteActionsActionToken token, enabling them ...

PT-2026-46862

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction fails to validate that the newly created credential's parameters, such as public key...

CVE-2026-8830: Use of Client-Side Authentication

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction fails to validate that the newly created credential's parameters, such as public key...

Insufficient Session Expiration

Overview edumfa is an eduMFA: identity, multifactor authentication OTP, authorization, audit Affected versions of this package are vulnerable to Insufficient Session Expiration due to missing expiration information in the userless Passkey/WebAuthn challenge process. An attacker can authenticate a...

GHSA-QQ2P-4282-CFC5 eduMFA: Incorrect InnoDB snapshot isolation possibly allows token reusage

Impact For deployments using MySQL or MariaDB = 11.6.2 the default is ON, which is not affected - Same rules applies for Galera with underlying MariaDB Patches Fixed in version 2.9.1 by locking rows prior to write with SELECT FOR UPDATE. Workarounds Set innodbsnapshotisolation to ON default in...

PT-2026-44442

Impact In eduMFA = 2.9.1 by adding validity information to the userless challenges. Workarounds No known workarounds besides disabling userless login altogether...

com.yubico:webauthn-server-attestation (2.9.0-alpha1), org.apereo.cas:cas-server-support-webauthn-core (8.0.0-rc4) +1 more potentially affected by CVE-2026-46419 via com.yubico:webauthn-server-core (2.9.0-alpha1)

com.yubico:webauthn-server-core MAVEN version 2.9.0-alpha1 is affected by a known vulnerability. The following packages have a transitive dependency on com.yubico:webauthn-server-core and may be impacted: - com.yubico:webauthn-server-attestation 2.9.0-alpha1 -...

Incorrect Check of Function Return Value

Overview Affected versions of this package are vulnerable to Incorrect Check of Function Return Value in the "second factor" flow where FinishAssertionSteps fails to cross-check the verified credential handle against the requested username when a userHandle is not found for that username during t...

CVE-2026-46419

Yubico webauthn-server-core aka java-webauthn-server 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation...

java-webauthn-server security vulnerability

java-webauthn-server is a Java server-side web authentication library developed by Yubico. There were security vulnerabilities in versions of java-webauthn-server from 2.8.0 to 2.8.2. These vulnerabilities stemmed from incorrect check functions that accessed return values during the second-factor...

CVE-2026-46419

Yubico webauthn-server-core aka java-webauthn-server 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation...

CVE-2026-46419

Yubico webauthn-server-core aka java-webauthn-server 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation...

CVE-2026-46419: Incorrect Check of Function Return Value

Yubico webauthn-server-core aka java-webauthn-server 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation...