CVE-2026-72649: Elastic Elasticsearch

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Deserialization of Untrusted Data (CWE-502) in the Elasticsearch machine learning component can lead to remote code execution via Object Injection (CAPEC-586). A specially crafted trained model artifact could cause attacker-controlled logic to execute with a materially broader system-call surface than intended. Exploitation requires an authenticated user with sufficient privileges to create and deploy trained models.

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); version 9.5.0 only

Published 2026-09-01. Last modified 2026-09-02.