CVE-2026-9792: Improper Handling of Insufficient Permissions or Privileges in Red Hat Red Hat build of Keycloak 26.4
A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.
AI Analysis
Technical Summary
The vulnerability resides in the org.keycloak.protocol.oidc component of Red Hat build of Keycloak 26.4, where the 'reject-ropc-grant' executor is silently bypassed under certain client policy conditions (client-type, client-roles, client-attributes, client-scopes). This bypass permits unauthenticated remote attackers to acquire tokens via the ROPC grant flow even when policies are configured to block such grants. The issue results from improper handling of insufficient permissions or privileges in client policies, potentially leading to unauthorized access and information disclosure. Red Hat has addressed this issue in the Keycloak 26.6.3 release, providing updated container images for OpenShift deployments.
Potential Impact
An unauthenticated remote attacker can bypass configured security restrictions intended to block Resource Owner Password Credentials (ROPC) grant token acquisition. This unauthorized token issuance can lead to unauthorized access to protected resources and potential information disclosure. The CVSS 3.1 base score is 6.5 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact on confidentiality and integrity but not availability.
Mitigation Recommendations
Red Hat has released updated Keycloak 26.6.3 images that fix this vulnerability. Users should upgrade to Red Hat build of Keycloak 26.6.3 or later to remediate this issue. Before applying the update, back up existing installations, including applications, configuration files, and databases. Patch status is confirmed by the vendor advisory. No alternative mitigations or workarounds are specified in the advisory.
CVE-2026-9792: Improper Handling of Insufficient Permissions or Privileges in Red Hat Red Hat build of Keycloak 26.4
Description
A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.
CVSS v3.1
Score 6.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability resides in the org.keycloak.protocol.oidc component of Red Hat build of Keycloak 26.4, where the 'reject-ropc-grant' executor is silently bypassed under certain client policy conditions (client-type, client-roles, client-attributes, client-scopes). This bypass permits unauthenticated remote attackers to acquire tokens via the ROPC grant flow even when policies are configured to block such grants. The issue results from improper handling of insufficient permissions or privileges in client policies, potentially leading to unauthorized access and information disclosure. Red Hat has addressed this issue in the Keycloak 26.6.3 release, providing updated container images for OpenShift deployments.
Potential Impact
An unauthenticated remote attacker can bypass configured security restrictions intended to block Resource Owner Password Credentials (ROPC) grant token acquisition. This unauthorized token issuance can lead to unauthorized access to protected resources and potential information disclosure. The CVSS 3.1 base score is 6.5 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact on confidentiality and integrity but not availability.
Mitigation Recommendations
Red Hat has released updated Keycloak 26.6.3 images that fix this vulnerability. Users should upgrade to Red Hat build of Keycloak 26.6.3 or later to remediate this issue. Before applying the update, back up existing installations, including applications, configuration files, and databases. Patch status is confirmed by the vendor advisory. No alternative mitigations or workarounds are specified in the advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-05-28T03:09:25.012Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-9792","vendor":"Red Hat"}]
Threat ID: 6a189d28e29bf47b50227aff
Added to database: 05/28/2026, 19:53:12 UTC
Last enriched: 06/26/2026, 12:22:32 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 115
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