Deserialization of Untrusted Data in Hazelcast - #VU153046
Published: October 1, 2026
Vulnerability identifier: #VU153046
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code or disclose information.
The vulnerability exists due to insecure deserialization in JSON/BSON deserialization when processing JSON/BSON data from a client. A remote user can submit crafted JSON/BSON data to instantiate objects insecurely to execute arbitrary code or disclose information.
Affected software
Hazelcast
Remediation
Install security update from vendor's website.
Hazelcast - addressed in versions 5.4.5, 5.5.10, 5.6.2, 5.7.0