CVE-2026-72685 — Inefficient Algorithmic Complexity in Elasticsearch Leading to Denial of Service

CVE-2026-72685

Inefficient Algorithmic Complexity in Elasticsearch Leading to Denial of Service PUBLISHED

Description (CNA)

A flaw in Elasticsearch allows a low-privileged authenticated user who can index documents to submit a single small document containing a crafted user-supplied input. Processing one such document occupies a worker thread from a bounded pool for a disproportionate amount of time, degrading the availability of indexing operations on 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-407

References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-77/389500

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.