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{"bugzilla": {"description": "com.hazelcast/hazelcast: Hazelcast: Arbitrary member memory access by low-privileged client", "id": "2548303", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548303"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in Hazelcast. Improper validation of client-supplied data allows a connected client to corrupt memory, potentially leading to arbitrary code execution on cluster members. Additionally, an attacker can exploit this vulnerability to read sensitive memory contents from cluster nodes or crash them, resulting in a denial of service (DoS)."], "mitigation": {"lang": "en:us", "value": "Restrict network connectivity to Hazelcast cluster member communication ports (default TCP 5701 through 5708) using firewall rules so that only verified, trusted client systems can establish connections."}, "name": "CVE-2026-107726", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "maven-resolver", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "maven:3.9/maven-resolver", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Under investigation", "package_name": "hazelcast", "product_name": "Red Hat Fuse 7"}], "public_date": "2026-10-08T22:08:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-107726\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-107726\nhttps://docs.hazelcast.com/hazelcast/5.7/release-notes/community\nhttps://docs.hazelcast.com/hazelcast/5.7/release-notes/enterprise\nhttps://github.com/hazelcast/hazelcast/commit/361979da12f18950c24719db832ca6c5e7c0534f\nhttps://github.com/hazelcast/hazelcast/releases/tag/v5.7.0\nhttps://github.com/hazelcast/hazelcast/security/advisories/GHSA-6v25-8wq6-xq4j"], "statement": "This vulnerability is rated as Important severity for Red Hat products because an attacker with network connectivity to a cluster member can remotely access process memory, crash cluster instances, or potentially execute arbitrary code without requiring elevated privileges. Any compromised application or client permitted to connect to the cluster communication port can exploit this input handling flaw to disclose sensitive heap data or trigger cluster-wide denial of service.", "threat_severity": "Important"}

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