---
id: CVE-2026-78323
title: A flaw was found in JSS (Java Security Services)
summary: >-
  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 tru…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-295
published: '2026-08-24'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78323'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-78323'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2521775'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00176
epssPercentile: 0.06656
ingestedAt: '2026-10-14T13:30:58.558Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.