What’s Vulnerable › Vulnerabilities

CVE-2026-1486: Org.keycloak.protocol.oidc.grants: disabled identity providers are still accepted for jwt authorization grant

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-09 · updated 2026-07-15
• Weakness: CWE-358

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.

Affected products

• Red Hat build of Keycloak 26.4: all versions — fixed in 26.4-10, 26.4-11, 26.4.9-1

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.4-10, 26.4-11, 26.4.9-1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:2365
• https://access.redhat.com/errata/RHSA-2026:2366
• https://access.redhat.com/security/cve/CVE-2026-1486
• https://bugzilla.redhat.com/show_bug.cgi?id=2433347
• https://access.redhat.com/errata/RHSA-2026:2365
• https://access.redhat.com/errata/RHSA-2026:2366
• https://access.redhat.com/security/cve/CVE-2026-1486
• https://bugzilla.redhat.com/show_bug.cgi?id=2433347
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1486.json

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