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Releases

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

Feb 2026Clear ×Project: KeycloakClear ×
Keycloak26.5.4SecurityFeb 20, 2026

A maintenance release with five disclosed security fixes, one new capability, and ten corrected bugs. It contains no operator prerequisites or dependency-manifest entries.

Action needed (2)

  • securitymediumCVE-2026-0707, authorization header parsing

    This release corrects authorization header parsing that could bypass security controls.

  • securitylowCVE-2025-5416, keycloak-core environment information disclosure

    This release fixes environment information disclosure in keycloak-core.

Check if affected (4)

  • securitymediumCVE-2026-2575, excessive SAMLRequest decompression

    Applies if you use SAML.

    This release fixes excessive SAMLRequest decompression that can cause denial of service.

  • securitylowCVE-2026-1190, SAML brokering response delay

    Applies if you use SAML brokering.

    This release fixes the unchecked NotOnOrAfter handling in SubjectConfirmationData that can delay SAML brokering responses.

  • securitylowCVE-2026-2733, disabled client check for Docker Registry Protocol

    Applies if you use the Docker Registry Protocol.

    This release adds the missing check for disabled clients in the Docker Registry Protocol.

  • + 1 more on the release page
Source
Keycloak26.5.3SecurityFeb 10, 2026

A maintenance release focused on security fixes, with additional ordinary bug corrections. It also includes startup-memory corrections and a removal related to that area.

Action needed (4)

  • securityhighCVE-2026-1609, disabled users obtaining tokens through the JWT Authorization Grant

    Keycloak 26.5.3 fixes an issue where disabled users could still obtain tokens through the JWT Authorization Grant.

  • securityhighCVE-2026-1529, forged invitation JWT enabling cross-organization self-registration

    Keycloak 26.5.3 fixes an issue where a forged invitation JWT could enable self-registration across organizations.

  • securityhighCVE-2026-1486, authentication through disabled identity providers

    Keycloak 26.5.3 fixes a logic bypass in the JWT Authorization Grant that allowed authentication through disabled identity providers.

  • securitymediumCVE-2025-14778, incorrect ownership checks in /uma-policy/

    Keycloak 26.5.3 fixes incorrect ownership checks in the /uma-policy/ endpoint.

Source
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