Is CVE-2026-78323 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-78323?

CVE-2026-78323 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-78323

Description

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.