CVE-2026-9795

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{"acknowledgement": "Red Hat would like to thank Andrej Tomci for reporting this issue.", "bugzilla": {"description": "keycloak: Keycloak: Privilege escalation via improper scope mapping enforcement", "id": "2482462", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482462"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-266", "details": ["A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, disable the Fine-Grained Admin Permissions (FGAPv2) feature in Keycloak if it is not strictly required. This can typically be done by setting `adminPermissionsEnabled` to `false` in the realm configuration. Disabling FGAPv2 will prevent the exploitation of this flaw by removing the vulnerable functionality. However, this may impact administrative delegation capabilities within Keycloak. A restart or reload of the Keycloak service may be required for the changes to take effect."}, "name": "CVE-2026-9795", "package_state": [{"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "rhbk/keycloak-rhel9", "product_name": "Red Hat Build of Keycloak"}], "public_date": "2026-05-28T03:16:49Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-9795\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-9795"], "statement": "This is an Important privilege escalation flaw in Keycloak when Fine-Grained Admin Permissions (FGAPv2) are enabled. An attacker with fine-grained client management permissions can bypass role mapping restrictions, allowing them to inject arbitrary realm roles into a client's scope. Subsequent authentication by a privileged user through the compromised client would then project these injected roles into their token, leading to unauthorized access. Exploitation requires specific administrative preconditions and user interaction.", "threat_severity": "Important"}

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