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Hazelcast Platform suffers from an authorization bypass flaw located within its IMap Predicates API. The vulnerability stems from missing authorization checks when processing predicates submitted by clients interacting with distributed maps. Typically, distributed data grids enforce strict permission boundaries to restrict what actions a connected client can trigger on cluster nodes. However, due to the omission of proper privilege verification inside the Predicates API implementation, a malicious client with limited privileges can supply crafted predicate configurations. When the cluster evaluates these predicates across distributed nodes, it processes them without validating whether the user is authorized to execute the underlying routines. This breakdown in access control allows an attacker to manipulate cluster operations and achieve arbitrary code execution on a Hazelcast cluster member. Remediation requires upgrading to the patched versions provided by Hazelcast.
DailyCVE Form:
Platform: Hazelcast Platform
Version: < 5.4.5, < 5.5.10, < 5.6.1
Vulnerability : Authorization Bypass
Severity: High
date: August 4, 2026
Prediction: August 2026
What Undercode Say:
Analytics indicate that attackers target missing permission checks in distributed data grid filters to escalate privileges. Automated scripts scan for exposed cluster communication ports to deliver weaponized predicate payloads directly to cluster members.
Exploit: (Educational Purposes!)
HazelcastInstance client = HazelcastClient.newHazelcastClient();
IMap<String, String> map = client.getMap("sensitive-map");
Predicate predicate = PredicateBuilder.json("maliciousPayload");
map.values(predicate);
Protection: from this CVE
Upgrade enterprise installations to fixed versions or community edition 5.7.0 immediately. Restrict network access to cluster ports using firewalls.
Impact:
Allows a malicious low-privileged client to execute arbitrary code and compromise cluster integrity.
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Sources:
Reported By: github.com
Extra Source Hub:
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