by Kastro CVE-2026-107726
hazelcast hazelcast — Hazelcast: Arbitrary member memory access by low-privileged client
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
hazelcast< 5.4.5–CNA
hazelcast>= 5.5.0, < 5.5.10–CNA
hazelcast>= 5.6.0, < 5.6.1–CNA
Scores by source
GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total