FKIE_CVE-2026-107726

Vulnerability from fkie_nvd - Published: 2026-10-08 22:17 - Updated: 2026-10-09 16:35
Severity
9.3 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
Hazelcast is a unified real-time data platform combining stream processing with a fast data store. Prior to 5.4.5, 5.5.10, and 5.6.1, improper validation of data supplied by a malicious client able to connect to a cluster allows arbitrary reads from a cluster member's Java heap, off-heap data, and JVM process address space. The same flaw can crash cluster members and, in some Hazelcast Enterprise Edition configurations, corrupt memory with possible arbitrary code execution. Both slim and full distributions are affected. This issue is fixed in versions 5.4.5, 5.5.10, 5.6.1, and 5.7.0.
References
security-advisories@github.comhttps://docs.hazelcast.com/hazelcast/5.7/release-notes/community
security-advisories@github.comhttps://docs.hazelcast.com/hazelcast/5.7/release-notes/enterprise
security-advisories@github.comhttps://github.com/hazelcast/hazelcast/commit/361979da12f18950c24719db832ca6c5e7c0534f
security-advisories@github.comhttps://github.com/hazelcast/hazelcast/releases/tag/v5.7.0
security-advisories@github.comhttps://github.com/hazelcast/hazelcast/security/advisories/GHSA-6v25-8wq6-xq4j
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "hazelcast",
          "vendor": "hazelcast",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.4.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.5.0, \u003c 5.5.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.6.0, \u003c 5.6.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hazelcast is a unified real-time data platform combining stream processing with a fast data store. Prior to 5.4.5, 5.5.10, and 5.6.1, improper validation of data supplied by a malicious client able to connect to a cluster allows arbitrary reads from a cluster member\u0027s Java heap, off-heap data, and JVM process address space. The same flaw can crash cluster members and, in some Hazelcast Enterprise Edition configurations, corrupt memory with possible arbitrary code execution. Both slim and full distributions are affected. This issue is fixed in versions 5.4.5, 5.5.10, 5.6.1, and 5.7.0."
    }
  ],
  "id": "CVE-2026-107726",
  "lastModified": "2026-10-09T16:35:35.900",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-107726",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-09T15:07:22.266395Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-08T22:17:29.120",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.hazelcast.com/hazelcast/5.7/release-notes/community"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.hazelcast.com/hazelcast/5.7/release-notes/enterprise"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hazelcast/hazelcast/commit/361979da12f18950c24719db832ca6c5e7c0534f"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hazelcast/hazelcast/releases/tag/v5.7.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hazelcast/hazelcast/security/advisories/GHSA-6v25-8wq6-xq4j"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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