CVE-2026-72649

Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution

State: Published
Severity: 8.8 High
Published: Sep 1, 2026
Updated: Sep 2, 2026
Reserved: Aug 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	elastic

Weaknesses

CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
ElasticsearchElastic	8.0.0 through 8.19.19Affected 9.0.0 through 9.4.4Affected 9.5.0Affected

References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-114/390087

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