CVE-2026-78607: Missing Authorization in Elasticsearch Leading to Information Disclosure

Overview

Severity

Medium (CVSS 5.4)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-03

EPSS Score

0.17% (percentile: 6.0%)

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.