FKIE_CVE-2026-2575

Vulnerability from fkie_nvd - Published: 2026-03-18 04:17 - Updated: 2026-03-18 14:52
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:3947
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:3948
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-2575
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2440149
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en Keycloak. Un atacante remoto no autenticado puede desencadenar una denegaci\u00f3n de servicio (DoS) a nivel de aplicaci\u00f3n al enviar una SAMLRequest altamente comprimida a trav\u00e9s del SAML Redirect Binding. El servidor no aplica l\u00edmites de tama\u00f1o durante la descompresi\u00f3n DEFLATE, lo que lleva a un OutOfMemoryError (OOM) y la subsiguiente terminaci\u00f3n del proceso. Esta vulnerabilidad permite a un atacante interrumpir la disponibilidad del servicio."
    }
  ],
  "id": "CVE-2026-2575",
  "lastModified": "2026-03-18T14:52:44.227",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "secalert@redhat.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-18T04:17:16.783",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:3947"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:3948"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-2575"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440149"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-409"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Primary"
    }
  ]
}


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