FKIE_CVE-2026-4366

Vulnerability from fkie_nvd - Published: 2026-03-18 04:17 - Updated: 2026-03-18 14:52
Severity ?
5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Summary
A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended requests to internal or restricted resources. As a result, sensitive internal services such as cloud metadata endpoints could be accessed. This issue may lead to information disclosure and enable attackers to map internal network infrastructure.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-4366
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2448543
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended requests to internal or restricted resources. As a result, sensitive internal services such as cloud metadata endpoints could be accessed. This issue may lead to information disclosure and enable attackers to map internal network infrastructure."
    },
    {
      "lang": "es",
      "value": "Se identific\u00f3 una vulnerabilidad en Keycloak, una soluci\u00f3n de gesti\u00f3n de identidades y accesos, donde sigue incorrectamente las redirecciones HTTP al procesar ciertas solicitudes de configuraci\u00f3n del cliente. Este comportamiento permite a un atacante enga\u00f1ar al servidor para que realice solicitudes no intencionadas a recursos internos o restringidos. Como resultado, servicios internos sensibles como los puntos finales de metadatos en la nube podr\u00edan ser accedidos. Este problema puede llevar a la revelaci\u00f3n de informaci\u00f3n y permitir a los atacantes mapear la infraestructura de red interna."
    }
  ],
  "id": "CVE-2026-4366",
  "lastModified": "2026-03-18T14:52:44.227",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "secalert@redhat.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-18T04:17:32.450",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-4366"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448543"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.