CVE-2026-1486
HIGH EPSS 35.9%
Published Feb 9, 20264mo ago · Modified Apr 15, 20262mo ago
8.8 CVSS 3.1
Published Feb 9, 2026 4mo ago
Last Modified Apr 15, 2026 2mo ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
35.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-358
References 4
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:2365
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:2366
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-1486
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2433347
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.