What’s Vulnerable › Vulnerabilities
CVE-2026-72649: Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-01 · updated 2026-09-02
- Weakness: CWE-502
Description
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
- Elasticsearch: from 8.0.0 before 8.19.20; from 9.0.0 before 9.4.5; 9.5.0 — fixed in 8.19.20, 9.4.5
How to fix
Upgrade to a fixed version: Elasticsearch 8.19.20, 9.4.5. Check the vendor advisory for mitigations.
References
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