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CVE-2026-91631

Status: Awaiting AnalysisMedium (5)—
Severity5Medium · CVSS 3.1
Exploitation probability0.29 %higher than 21% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase. While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Essbase accessible data. CVSS 3.1 Base Score 5.0 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N).

CVSS

Base score
5
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.29 %
Percentile among all scored CVEs
21
Score date
10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector AV:N con PR:L y UI:N; el texto describe lectura no autorizada de un subconjunto de datos accesibles de Essbase, sin ejecución ni credenciales.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationDisable or Remove Feature or ProgramApplication Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Oracle — EssbaseAI

References

Show 1 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-91631",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "secalert_us@oracle.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "secalert_us@oracle.com",
      "affectedData": [
        {
          "vendor": "Oracle Corporation",
          "product": "Oracle Essbase",
          "versions": [
            {
              "status": "affected",
              "version": "21.8.3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-10-20T22:21:03.003",
  "references": [
    {
      "url": "https://www.oracle.com/security-alerts/cpuoct2026.html",
      "source": "secalert_us@oracle.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "Vulnerability in Oracle Essbase (component: Security).   The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase.  While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized read access to a subset of Oracle Essbase accessible data. CVSS 3.1 Base Score 5.0 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)."
    }
  ],
  "lastModified": "2026-10-21T18:44:55.490",
  "sourceIdentifier": "secalert_us@oracle.com"
}