CVE-2026-9791
Full vulnerability record from the local CVENow database.
Description
A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers.
Severity
MEDIUM
CVSS score
4.3
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-05-28 05:16:39.977000
Last modified
2026-10-26 12:10:00.130000
View original CVE JSON
{
"id": "CVE-2026-9791",
"sourceIdentifier": "[email protected]",
"published": "2026-05-28T05:16:39.977",
"lastModified": "2026-10-26T12:10:00.130",
"vulnStatus": "Modified",
"cveTags": [],
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"value": "A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad en Keycloak. Un usuario autenticado con una membresía de organización existente puede explotar esta vulnerabilidad al acceder a las API orientadas al usuario, como la API de cuenta, o al solicitar un token de OpenID Connect (OIDC) con el ámbito ’organization’. Esto permite que los metadatos de la organización se divulguen en los tokens, incluso después de que un administrador haya deshabilitado explícitamente la función de Organizaciones, lo que podría llevar a decisiones de autorización incorrectas por parte de los servidores de recursos."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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"product": "Red Hat build of Keycloak 26.4",
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"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.8,
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"id": "CVE-2026-9791",
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"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
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"lang": "en",
"value": "CWE-863"
}
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"configurations": [
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"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:25097",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:25098",
"source": "[email protected]"
},
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"source": "[email protected]"
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{
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"source": "[email protected]"
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{
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"source": "[email protected]",
"tags": [
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{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482458",
"source": "[email protected]",
"tags": [
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}