Unauthorized token issuance via disabled identity providers
Published Feb 9, 2026 · Updated Feb 9, 2026
Authentication bypass in Red Hat build of Keycloak 26.4 allows remote authenticated users to obtain access tokens through disabled IdPs. lookupIdentityProviderFromIssuer retrieves the issuer's IdP configuration without rejecting isEnabled=false before the JWT authorization grant issues a token. Exploitation requires valid client credentials, the disabled IdP's signing key, and the preview JWT authorization-grant feature, enabling continued unauthorized access after trust is revoked.
Summary
What happened
Authentication bypass in Red Hat build of Keycloak 26.4 allows remote authenticated users to obtain access tokens through disabled IdPs. lookupIdentityProviderFromIssuer retrieves the issuer's IdP configuration without rejecting isEnabled=false before the JWT authorization grant issues a token. Exploitation requires valid client credentials, the disabled IdP's signing key, and the preview JWT authorization-grant feature, enabling continued unauthorized access after trust is revoked.
The record
- CVE
- CVE-2026-1486
- Published
- Feb 9, 2026
- Updated
- Feb 9, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat build of Keycloak
- Classifications
- CWE-358, T1606
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 9, 2026CVE publishedPublication date reported by the CVE source.
- Feb 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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