Vulnerability in Red Hat Certificate System 10
CVE-2026-78323
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.
Vulnerability class: Improper Certificate Validation
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
Frequently asked questions
- What is CVE-2026-78323?
- CVE-2026-78323 is a medium-severity vulnerability in Red Hat Certificate System 10, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2026-08-24.
- How severe is CVE-2026-78323?
- Medium severity. CVSS v3 base score is 6.5 out of 10.