CVE-2026-78323: Red Hat Certificate System 10

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in JSS (Java Security Services). The JSSTrustManager class does not verify NSS trust flags when validating CA certificates, allowing certificates present in the NSS database without TRUSTED_CA flags to be accepted as trust anchors for TLS connections. In non-default configurations where certificate revocation checking is disabled, this could allow a man-in-the-middle attacker to forge certificates accepted by PKI client connections.

Affected products

• Red Hat Red Hat Certificate System 10
• Red Hat Red Hat Certificate System 11
• 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 2026-08-24. Last modified 2026-08-28.