CVE-2022-39272: Fluxcd FLUX2

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Flux is an open and extensible continuous delivery solution for Kubernetes. Versions prior to 0.35.0 are subject to a Denial of Service. Users that have permissions to change Flux’s objects, either through a Flux source or directly within a cluster, can provide invalid data to fields `.spec.interval` or `.spec.timeout` (and structured variations of these fields), causing the entire object type to stop being processed. This issue is patched in version 0.35.0. As a workaround, Admission controllers can be employed to restrict the values that can be used for fields `.spec.interval` and `.spec.timeout`, however upgrading to the latest versions is still the recommended mitigation.

Affected products

• Fluxcd FLUX2: from 0.1.0, before 0.35.0 (fixed in 0.35.0)
• Fluxcd Helm-Controller: from 0.0.2, before 0.24.0 (fixed in 0.24.0); version 0.0.1 only
• Fluxcd Image-Automation-Controller: from 0.1.0, before 0.26.0 (fixed in 0.26.0)
• Fluxcd Image-Reflector-Controller: from 0.1.0, before 0.22.0 (fixed in 0.22.0)
• Fluxcd Kustomize-Controller: from 0.0.2, before 0.29.0 (fixed in 0.29.0); version 0.0.1 only
• Fluxcd Notification-Controller: from 0.0.2, before 0.27.0 (fixed in 0.27.0); version 0.0.1 only
• Fluxcd Source-Controller: from 0.0.2, before 0.30.0 (fixed in 0.30.0); version 0.0.1 only

Published 2022-10-22. Last modified 2026-06-17.