CVE-2026-72685: Elastic Elasticsearch

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Elastic Elasticsearch: from 8.0.0, before 8.19.20 (fixed in 8.19.20); from 9.0.0, before 9.4.5 (fixed in 9.4.5)

Published 2026-08-13. Last modified 2026-09-01.