Elasticsearch 8.19.23, 9.4.8, 9.5.5 Security Update (ESA-2026-195)

Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large description field are created and subsequently accessed, exhausting available heap memory and crashing the affected node. Affected Versions: 8.x: All versions from 8.12.0 up to and including…

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