CVE-2026-104988: Red Hat Certificate System 10

High severity, CVSS 8.1. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in Dogtag PKI (pki-core). The CMCAuthForEST authentication plugin fails open when an EST fullcmc enrollment request is submitted via BasicAuth without an end-user TLS client certificate. The SSL_CLIENT_CERT session attribute retains the EST subsystem's agent certificate, which causes downstream authorization checks to treat the request as agent-privileged. An authenticated EST user can exploit this to obtain CA-signed certificates with arbitrary subject names.

Affected products

• Red Hat Red Hat Certificate System 10
• Red Hat Red Hat Certificate System 11
• 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 2026-10-02. Last modified 2026-10-06.