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Releases

AI-analyzed release notes for CNCF graduated and incubating projects.

Project: KeycloakClear ×
Keycloak26.6.0SecurityApr 8, 2026

A substantial operator-facing feature and maintenance release adds new capabilities, configuration and deployment options, performance improvements, and many bug fixes. It also changes selected defaults, deprecates Token Exchange v1, and includes security and correctness fixes for authorization, identity and URL handling, SCIM, anti-phishing checks, and UMA token validation.

Action needed (6)

  • securitySeparate password and OTP brute force protection

    Password and OTP brute force protection are now separate by default to prevent OTP bypass attacks.

  • securityResourceAdminManager URL construction validation

    URL construction in ResourceAdminManager is validated against matrix parameter injection.

  • securityClient retrieval anti-ID phishing check

    Client retrieval now includes the missing anti-ID phishing check.

  • breakingZero-downtime patch releases enabled by default

    Zero-downtime patch releases are now promoted to supported and enabled by default.

  • breaking--truststore-kubernetes-enabled enabled by default

    The behavior controlled by --truststore-kubernetes-enabled is enabled by default.

  • breakingTen-second default not-before validation

    The default not-before validation period is now 10 seconds instead of 0.

Check if affected (7)

  • securityWorkflows admin permission boundaries

    Applies if you use Workflows.

    Workflows execution no longer bypasses admin permission boundaries from manage-realm to realm-admin.

  • securityOrganizations login IdP alias disclosure

    Applies if you use Organizations.

    Organizations login no longer leaks IdP aliases when no Organization is resolved, preventing IdP and tenant enumeration.

  • securitySCIM PUT body ID override protection

    Applies if you use SCIM.

    The SCIM PUT endpoint no longer permits resource modification through a body ID override.

  • + 4 more on the release page

Plan ahead (1)

  • deprecatedToken Exchange v1 deprecation

    Applies if you use Token Exchange v1.

    Token Exchange v1 is deprecated in this release.

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