CVE-2026-107726Critical· 8.8▾ MidnightHazelcast 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 arbitrar…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the vendor's CSAF advisory record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 10.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.4%
— → 8.8
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
com.hazelcast:hazelcast = 5.6.0com.hazelcast:hazelcast >= 5.5.0, < 5.5.10com.hazelcast:hazelcast < 5.4.5Patched in:
com.hazelcast:hazelcast 5.7.0com.hazelcast:hazelcast 5.7.0com.hazelcast:hazelcast 5.7.0Source: https://github.com/advisories/GHSA-6v25-8wq6-xq4j
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-107725High· 8.7Hazelcast is a unified real-time data platform combining stream processing with a fast data store
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