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CVE-2026-8858

Full vulnerability record from the local CVENow database.

Description

IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in.

Severity
HIGH
CVSS score
8.8 (v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-06-22 16:16:42.967000
Last modified
2026-10-25 23:10:00.167000
View original CVE JSON
{
  "id": "CVE-2026-8858",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-22T16:16:42.967",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in."
    },
    {
      "lang": "es",
      "value": "IBM WebSphere Application Server y IBM WebSphere Application Server Liberty son vulnerables a ejecución remota de código y denegación de servicio en el componente de plug-in del servidor web de WebSphere. Esta vulnerabilidad puede ser explotada cuando un atacante suplanta al servidor de aplicaciones y envía respuestas manipuladas al plug-in."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "IBM",
          "product": "WebSphere Application Server",
          "defaultStatus": "unaffected",
          "cpes": [
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          ],
          "versions": [
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              "version": "8.5",
              "status": "affected"
            },
            {
              "version": "9.0",
              "status": "affected"
            }
          ]
        }
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    }
  ],
  "metrics": {
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        "type": "Secondary",
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          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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      }
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        "ssvcData": {
          "timestamp": "2026-06-23T03:56:00.365269Z",
          "id": "CVE-2026-8858",
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            },
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              "automatable": "no"
            },
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              "technicalImpact": "total"
            }
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          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
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      ]
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  "references": [
    {
      "url": "https://www.ibm.com/support/pages/node/7276560",
      "source": "[email protected]"
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}