CVE-2021-3499: Ovn Ovn-Kubernetes

Medium severity, CVSS 5.6. EPSS: 0.8% chance of exploitation in the next 30 days.

A vulnerability was found in OVN Kubernetes in versions up to and including 0.3.0 where the Egress Firewall does not reliably apply firewall rules when there is multiple DNS rules. It could lead to potentially lose of confidentiality, integrity or availability of a service.

Affected products

• Ovn Ovn-Kubernetes: up to and including 0.3.0

Published 2021-06-02. Last modified 2026-06-17.