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{"acknowledgement": "Red Hat would like to thank Ap4sh (Samy Medjahed) and Ethicxz (Eliott Laurie) for reporting this issue.", "bugzilla": {"description": "keycloak-services: keycloak-services: Device Authorization Grant bypasses per-client minimum.acr.value enforcement", "id": "2545801", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2545801"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-287", "details": ["A flaw was found in the OIDC implementation of Keycloak, specifically within the Device Authorization Grant flow. This component allows devices with limited input capabilities to obtain security tokens. The issue occurs because the flow fails to check the minimum authentication level required by a client configuration. This allows an attacker who has stolen a user's password to bypass mandatory multi-factor authentication and gain unauthorized access to the Keycloak Admin REST API."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-105305", "package_state": [{"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "keycloak-services", "product_name": "Red Hat Build of Keycloak"}, {"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "rhbk/keycloak-rhel9", "product_name": "Red Hat Build of Keycloak"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Not affected", "package_name": "keycloak-services", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-10-06T06:51:34Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-105305\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-105305"], "statement": "The Red Hat Product Security team has assessed the severity of this vulnerability as Important, given that it allows for a bypass of multi-factor authentication (MFA) requirements. Successful exploitation allows an attacker to obtain a valid token and access the Keycloak Admin REST API with the client's scoped roles, provided they have obtained the user's primary credentials. The vulnerability's root cause is the failure of the Device Authorization Grant flow to enforce the per-client minimum.acr.value configuration.", "threat_severity": "Moderate"}

{"created": "2026-10-06T08:30:18.963574+00:00", "updated": "2026-10-06T08:30:18.963590+00:00", "vendors": []}