CVE-2026-53682: Red Hat Certificate System 9

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

An unauthenticated client can query the Security Domain hosts inventory via GET /ca/rest/securityDomain/hosts and receive a structured response enumerating internal PKI/CA hosts and roles (security domain topology and participating subsystems), without requiring a principal, client certificate, or session.

Affected products

• Red Hat Red Hat Certificate System 9
• Red Hat Red Hat Enterprise Linux 10
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9

Published 2026-09-01. Last modified 2026-09-23.