cve-2026-87420

HIGH CVSS 8.8 nvd
Description

Vulnerability in the Oracle Service Bus product of Oracle Fusion Middleware (component: Core). The supported version that is affected is 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Service Bus. Successful attacks of this vulnerability can result in takeover of Oracle Service Bus. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Timeline
Published
2026-10-20
Last Modified
2026-10-21
CVSS Details
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
Affected Products

No product information available.

Weaknesses (CWE)
CWE-284
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 2.8 5.9 secalert_us@oracle.com
NVD metadata
NVD status
Undergoing Analysis
Source identifier
secalert_us@oracle.com
References
Linked Vulnerabilities
cpuoct2026csaf csaf_oracle 

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  "cvss": 8.8,
  "datePublished": "2026-10-20T22:20:20.497",
  "dateUpdated": "2026-10-21T18:45:11.277",
  "description": "Vulnerability in the Oracle Service Bus product of Oracle Fusion Middleware (component: Core).   The supported version that is affected is 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Service Bus.  Successful attacks of this vulnerability can result in takeover of Oracle Service Bus. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).",
  "id": "CVE-2026-87420",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Oracle Service Bus",
            "vendor": "Oracle Corporation",
            "versions": [
              {
                "status": "affected",
                "version": "14.1.2.0.0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "secalert_us@oracle.com"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
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        "value": "Vulnerability in the Oracle Service Bus product of Oracle Fusion Middleware (component: Core).   The supported version that is affected is 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Service Bus.  Successful attacks of this vulnerability can result in takeover of Oracle Service Bus. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)."
      }
    ],
    "id": "CVE-2026-87420",
    "lastModified": "2026-10-21T18:45:11.277",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.9,
          "source": "secalert_us@oracle.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-87420",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-10-21T14:11:24.302909Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-10-20T22:20:20.497",
    "references": [
      {
        "source": "secalert_us@oracle.com",
        "url": "https://www.oracle.com/security-alerts/cpuoct2026.html"
      }
    ],
    "sourceIdentifier": "secalert_us@oracle.com",
    "vulnStatus": "Undergoing Analysis",
    "weaknesses": [
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          {
            "lang": "en",
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          }
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "severity": "HIGH",
  "source": "nvd",
  "title": "Vulnerability in the Oracle Service Bus product of Oracle Fusion Middleware (component: Core)"
}
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