CVE-2026-72683 — Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

Description (CNA)

A flaw in Elasticsearch allows an authenticated user with the privileges required to invoke the simulate pipeline API endpoint (https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-ingest-simulate) to submit a request that causes a self-referential data structure to be created. When a specific internal component later processes that structure, the operation recurses without bound and raises a fatal error that is not handled by the surrounding execution path, terminating the affected node process and resulting in a denial of service.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 5.0.0 through 8.19.18; affected 9.3.0 through 9.3.7; affected 9.4.0 through 9.4.3

CWE

CWE-674

References

https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-75/389496

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.