FKIE_CVE-2026-4628
Vulnerability from fkie_nvd - Published: 2026-03-23 09:16 - Updated: 2026-04-01 14:29
Severity ?
Summary
A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity.
References
| URL | Tags | ||
|---|---|---|---|
| secalert@redhat.com | https://access.redhat.com/security/cve/CVE-2026-4628 | Vendor Advisory | |
| secalert@redhat.com | https://bugzilla.redhat.com/show_bug.cgi?id=2450240 | Issue Tracking, Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| redhat | build_of_keycloak | - |
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"configurations": [
{
"nodes": [
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"cpeMatch": [
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"criteria": "cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*",
"matchCriteriaId": "E5C930CB-4EAD-497B-A44B-D880F2A1F85B",
"vulnerable": true
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"negate": false,
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak\u2019s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity."
},
{
"lang": "es",
"value": "Se encontr\u00f3 un fallo en Keycloak. Una vulnerabilidad de control de acceso inadecuado en el endpoint \u0027resource_set\u0027 de Acceso Gestionado por el Usuario (UMA) de Keycloak permite a atacantes con credenciales v\u00e1lidas eludir la restricci\u00f3n \u0027allowRemoteResourceManagement=false\u0027. Esto ocurre debido a la aplicaci\u00f3n incompleta de las comprobaciones de control de acceso en operaciones PUT al endpoint \u0027resource_set\u0027. Este problema permite la modificaci\u00f3n no autorizada de recursos protegidos, impactando la integridad de los datos."
}
],
"id": "CVE-2026-4628",
"lastModified": "2026-04-01T14:29:05.873",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 1.4,
"source": "secalert@redhat.com",
"type": "Primary"
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"published": "2026-03-23T09:16:26.140",
"references": [
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"tags": [
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"url": "https://access.redhat.com/security/cve/CVE-2026-4628"
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"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
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"lang": "en",
"value": "CWE-284"
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"source": "secalert@redhat.com",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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