CVE-2026-79652
Received Received - Intake

JWT Bearer Grant Consent Bypass in Keycloak

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: redhat-SADP

Description
A flaw was found in the JWT Bearer authorization grant implementation within the keycloak-services component of Red Hat Build of Keycloak. This component handles various OAuth2 and OpenID Connect grant types used for issuing access tokens. The issue occurs because the JWT Bearer grant fails to check if a client requires user consent before issuing a token. This allows an authenticated attacker with valid client credentials and a trusted identity provider assertion to bypass the consent requirement and obtain unauthorized access to a user account at a consent-gated client.

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Meta Information

Published
2026-08-25
Last Modified
2026-08-25
Generated
2026-08-25
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-79652
EUVD
EUVD-2026-65465

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
red_hat keycloak to 2026-79652 (inc)
red_hat keycloak *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This vulnerability is in Keycloak's JWT Bearer authorization grant mechanism. It fails to check if a client requires user consent before issuing an access token. An attacker with valid client credentials and a trusted identity provider assertion can bypass consent requirements and gain unauthorized access to a user account.

Impact Analysis

An attacker could obtain a valid access token for your account without your consent. This allows them to access your protected resources and APIs on your behalf, bypassing security policies that require your approval.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating compliance requirements like GDPR or HIPAA that mandate user consent and data protection controls.

Mitigation Strategies

Disable the JWT Bearer authorization grant type in Keycloak if not required. Review and enforce client consent requirements in configuration. Monitor for unauthorized token issuance attempts.

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