CVE-2026-72638 — Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

CVE-2026-72638

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 8.0.0 through 8.19.19; affected 9.0.0 through 9.4.4

CWE

CWE-674

References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-119/389498

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.