EUVD-2026-40299
GHSA-xmfr-m52w-m2hx
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Network-reachable Admin REST API requires authenticated low-privilege admin; confidentiality limited to user profile data; no integrity or availability impact.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
1DescriptionCVE.org
A vulnerability was discovered in Keycloak's Admin UI extension that allows certain administrative users to bypass security restrictions. When Fine-Grained Admin Permissions (FGAPv2) are enabled, an administrator who should only be able to search for users (but not view their full details) can use a specific "brute-force-user" endpoint to access a user's full profile. This includes sensitive information and security metadata. The issue occurs because the system fails to check if the administrator has the required "view" permission for that specific user when using this particular search path.
AnalysisAI
Unauthorized user profile disclosure in Red Hat Build of Keycloak allows low-privileged administrative users to bypass Fine-Grained Admin Permission (FGAPv2) restrictions and access complete user profiles they should only be permitted to search. An admin scoped exclusively to user-search rights can invoke the 'brute-force-user' endpoint to retrieve sensitive profile data and security metadata, circumventing the intended view-permission gate on that code path. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two explicit prerequisites: (1) Fine-Grained Admin Permissions v2 (FGAPv2) must be deliberately enabled in the target Keycloak realm - this is a non-default advanced configuration that must be activated by a realm administrator; (2) the attacker must possess a valid Keycloak administrative account that has been delegated at least user-search scope in that realm. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) yields a score of 4.3, correctly reflecting a network-reachable, low-complexity flaw requiring only low-level privilege and producing partial confidentiality loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A helpdesk administrator granted search-only permissions in a Keycloak realm with FGAPv2 enabled sends a crafted HTTP GET request to the Admin REST 'brute-force-user' endpoint, supplying a target user's ID. Because the endpoint omits the view-permission check present on other paths, Keycloak returns the target user's full profile - including account status, security metadata, and personal attributes - without verifying that the caller holds view rights. … |
| Remediation | Consult the Red Hat Security Advisory at https://access.redhat.com/security/cve/CVE-2026-14209 and the Bugzilla entry at https://bugzilla.redhat.com/show_bug.cgi?id=2494837 for the specific patched build version - no exact fixed release number is confirmed in the data available at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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