A flaw was found in Keycloak. A vulnerability exists in the jwt-authorization-grant flow where the server fails to verify if an Identity Provider (IdP) is enabled before issuing tokens. The issuer lookup mechanism (lookupIdentityProviderFromIssuer) retrieves the IdP configuration but does not filter for isEnabled=false. If an administrator disables an IdP (e.g., due to a compromise or offboarding), an entity possessing that IdP's signing key can still generate valid JWT assertions that Keycloak accepts, resulting in the issuance of valid access tokens.
History

Tue, 10 Feb 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
Vendors & Products Redhat build Of Keycloak

Tue, 10 Feb 2026 01:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak: cpe:/a:redhat:build_keycloak:26.4::el9
References

Tue, 10 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Mon, 09 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 09 Feb 2026 19:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in Keycloak. A vulnerability exists in the jwt-authorization-grant flow where the server fails to verify if an Identity Provider (IdP) is enabled before issuing tokens. The issuer lookup mechanism (lookupIdentityProviderFromIssuer) retrieves the IdP configuration but does not filter for isEnabled=false. If an administrator disables an IdP (e.g., due to a compromise or offboarding), an entity possessing that IdP's signing key can still generate valid JWT assertions that Keycloak accepts, resulting in the issuance of valid access tokens.
Title Org.keycloak.protocol.oidc.grants: disabled identity providers are still accepted for jwt authorization grant
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-358
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-02-09T18:36:10.268Z

Updated: 2026-02-10T01:00:47.265Z

Reserved: 2026-01-27T13:35:02.603Z

Link: CVE-2026-1486

cve-icon Vulnrichment

Updated: 2026-02-09T20:53:36.269Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-09T20:15:55.717

Modified: 2026-02-10T02:15:52.143

Link: CVE-2026-1486

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-09T18:23:00Z

Links: CVE-2026-1486 - Bugzilla