CVE-2026-107726

{
  "etk_id": "ETK-2026-1027",
  "cve_id": "CVE-2026-107726",
  "display_id": "CVE-2026-107726",
  "ghsa_id": "GHSA-6v25-8wq6-xq4j",
  "euvd_id": "EUVD-2026-95314",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Improper client-input validation in Hazelcast",
  "summary": "Hazelcast Community and Enterprise editions are affected by improper validation of data supplied by clients that can connect to a cluster. A low-privileged malicious client may read cluster-member memory or cause members to crash; some Enterprise configurations may also allow memory corruption. Exploitation requires client access to the cluster.",
  "mitigation": "Upgrade com.hazelcast:hazelcast to version 5.7.0. Until upgraded, restrict cluster access to trusted clients, enforce client authorization, and protect the cluster with network controls.",
  "vendor": "maven",
  "product": "maven:com.hazelcast:hazelcast",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "= 5.6.0"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "5.7.0"
      ],
      "package_name": "com.hazelcast:hazelcast",
      "purl": "pkg:maven/com.hazelcast/hazelcast"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 5.5.0, < 5.5.10"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "5.7.0"
      ],
      "package_name": "com.hazelcast:hazelcast",
      "purl": "pkg:maven/com.hazelcast/hazelcast"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 5.4.5"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "5.7.0"
      ],
      "package_name": "com.hazelcast:hazelcast",
      "purl": "pkg:maven/com.hazelcast/hazelcast"
    }
  ],
  "cwes": null,
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "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",
  "epss_score": 0.0038,
  "epss_percentile": 0.3094,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 15.763071,
  "t0_at": "2026-10-08T22:08:09.553000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-08T22:08:09.553000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-08T22:08:09.553000+00:00",
      "url": "https://github.com/advisories/GHSA-6v25-8wq6-xq4j"
    }
  }
}