CVE-2026-42297
High
Description
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.
SeverityHigh
CVSS8.3
Exploit probability—
ProductArgoproj Argo Workflows
PublishedMay 9, 2026
First seenMay 9, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- argoproj argo_workflows4.0.5 or later
- github.com/argoproj/argo-workflows/v44.0.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| argoproj argo_workflows | 4.0.0 ≤ v < 4.0.5 | 4.0.5 |
| github.com/argoproj/argo-workflows/v4Go | 4.0.0 ≤ v < 4.0.5 | 4.0.5 |
| github.com/argoproj/argo-workflowsGo | No range specified | — |
| github.com/argoproj/argo-workflows/v2Go | No range specified | — |
| github.com/argoproj/argo-workflows/v3Go | No range specified | — |
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