Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Hazelcast (Maven package com.hazelcast:hazelcast) versions before 5.7.0 are affected. Missing authorization checks in the IMap Predicates API may allow a malicious client to execute arbitrary code on a Hazelcast member. Upgrade to 5.7.0; Enterprise users can also use 5.6.1, 5.5.10, or 5.4.5, and no workaround is listed.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.7 | High | 4.0 | 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 | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0039, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:16 UTC First seen by agentprime
- 31 Oct 2026, 14:16 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-w294-6q5q-53p8
- OSV: GHSA-w294-6q5q-53p8
- github.com/hazelcast/hazelcast/security/advisories/GHSA-w294-6q5q-53p8
- github.com/hazelcast/hazelcast/commit/5d68f4828e2a914398a39f12fe11cafd335cefe0
- docs.hazelcast.com/hazelcast/5.7/release-notes/community
- docs.hazelcast.com/hazelcast/5.7/release-notes/releases
- github.com/hazelcast/hazelcast