Detections
Analytics
CVE-2026-72638
medium
Description
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). An authenticated user holding only low-privileged index creation permissions can submit a single request containing a specially crafted, malformed custom analysis definition that is resolved recursively without a cycle or depth check, exhausting the thread stack and terminating the affected node.
References
https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-119/389498