CVE-2026-78323
A flaw was found in JSS (Java Security Services).
Published Aug 24, 2026 · updated Oct 14, 2026
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.
Timeline
Detection, updates, and resolution for this record.
Aug 24, 2026 · NIST NVD
Detected
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 f
Oct 14, 2026 · NIST NVD
Updated
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 f
Sources
- CVE.orgCVE-2026-78323
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-78323
30-day exploitation probability 0.2%
first.org - NIST NVDCVE-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-defa
nvd.nist.gov