{
"id": "GHSA-rrv7-3mqf-hxfr",
"aliases": [
"CVE-2026-37978"
],
"details": "A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.",
"summary": "Keycloak: Information Disclosure via evaluate-scopes Admin API",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.6.2"
}
]
}
],
"package": {
"name": "org.keycloak:keycloak-services",
"ecosystem": "Maven"
}
}
],
"modified": "2026-06-04T15:33:01Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
}
],
"published": "2026-05-19T12:31:39Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-37978",
"type": "ADVISORY"
},
{
"url": "https://github.com/keycloak/keycloak/commit/492d1f04cdad425dadb9d5e1faa94dd17a875573",
"type": "WEB"
},
{
"url": "https://github.com/keycloak/keycloak/commit/ba9a18744dcec2ef46f284d25c1c0aa1c962a500",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:19596",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:19597",
"type": "WEB"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-37978",
"type": "WEB"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455327",
"type": "WEB"
},
{
"url": "https://github.com/keycloak/keycloak",
"type": "PACKAGE"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-05-19T12:16:17Z",
"github_reviewed_at": "2026-06-04T15:26:30Z"
}
}