CVE-2026-42297: Argoproj Argo Workflows

High severity, CVSS 8.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, the Sync Service's ConfigMap-backed provider (server/sync/sync_cm.go) performs zero authorization checks on all CRUD operations (create, read, update, delete). Any authenticated user — including those using fake Bearer tokens — can create, read, update, and delete Kubernetes ConfigMaps containing synchronization limits. This issue has been patched in version 4.0.5.

Affected products

• Argoproj Argo Workflows: from 4.0.0, before 4.0.5 (fixed in 4.0.5)

Published 2026-05-09. Last modified 2026-07-24.