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CVE

CVE-2026-1486

Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens
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CVE

CVE-2026-1486

Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-1486, https://github.com/keycloak/keycloak/issues/46146, https://github.com/keycloak/keycloak/pull/46148, https://github.com/keycloak/keycloak/commit/176dc8902ce552056d3648c4601d519afc6fb043, https://github.com/keycloak/keycloak/commit/8316e8538f0037d9f998181e73122cff93a94035, 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://github.com/keycloak/keycloak

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.00018%
EPSS Percentile
0.04515%
Introduced Version
26.5.0
Fix Available
26.5.3

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