PT-2026-60351 · Red Hat · Keycloak

Published 2026-07-16 · Updated 2026-07-16 · CVE-2026-1609

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Keycloak (affected versions not specified)

Description An improper access control issue exists when the JSON Web Token (JWT) authorization grant preview feature is enabled. Keycloak fails to validate the disabled status of a user account during the processing of JWT authorization grants. A remote attacker with low privileges can present a valid assertion token from an external identity provider to obtain a JWT for a disabled user, enabling unauthorized access to sensitive resources.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability. As a temporary mitigation, disable the JWT authorization grant preview feature.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-1609

Affected Products

Keycloak

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-1609 · Security Note
• https://github.com/keycloak/keycloak/releases/tag/26.5.3 · Note
• https://github.com/keycloak/keycloak/issues/46144 · Note
• https://twitter.com/VulmonFeeds/status/2077585257981763819 · Twitter Post
• https://bugzilla.redhat.com/show_bug.cgi?id=2435257 · Note
• https://access.redhat.com/security/cve/CVE-2026-1609 · Note