F5-K000163776: High severity F5 F5 Insight vulnerability

Published Oct 19, 2026
·
Updated

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.

Affected Software

1 affected componentFixes available
F5 F5 Insight>=1.0.0<=1.1.0
1.1.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.1.1

Event History

Oct 19, 2026
Advisory Published
via F5·10:39 PM
Data Sourced
via F5·10:39 PM
DescriptionSeverityWeaknessAffected Software

Contact

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