CVE-2026-12538

Full vulnerability record from the local CVENow database.

Description

IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.

Severity

MEDIUM

CVSS score

5.4 (v3.1)

Vulnerability status

Undergoing Analysis

Source identifier

[email protected]

Published

2026-11-04 21:18:11.440000

Last modified

2026-11-04 21:18:11.563000

View original CVE JSON

{
  "id": "CVE-2026-12538",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-04T21:18:11.440",
  "lastModified": "2026-11-04T21:18:11.563",
  "vulnStatus": "Undergoing Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "IBM",
          "product": "MQ Appliance",
          "cpes": [
            "cpe:2.3:a:ibm:mq_appliance:9.4:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:mq_appliance:9.4.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:mq_appliance:9.4.0.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:mq_appliance:9.4.1.0:*:*:*:*:*:*:*"
          ],
          "versions": [
            {
              "version": "9.4.0.0",
              "lessThanOrEqual": "9.4.0.26",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "9.4.1.0",
              "lessThanOrEqual": "9.4.5.3",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "10.0.0.1",
              "lessThanOrEqual": "10.0.0.5",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-124"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.ibm.com/support/pages/node/7293035",
      "source": "[email protected]"
    }
  ]
}