CVE-2026-72649: Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-03

EPSS Score

0.57% (percentile: 44.8%)

Affected Products (1)

Open Source Software

• azl3 rubygem-elasticsearch 8.9.0-1 on Azure Linux 3.0

Security Updates (1)

• Security Update

Revision History

• 2026-09-03: Information published.