The Argo Workflows Sync Service's ConfigMap-backed provider performs no authorization checks for any create, read, update, or delete operations. Any authenticated user, even those using invalid fake Bearer tokens, can modify synchronization limit ConfigMaps. This can lead to workflow scheduling disruption and unintended cluster configuration changes.
Remediation
Upgrade Argo Workflows to the patched version 4.0.5 as soon as possible. Restrict network access to the Argo Sync Service endpoint to only trusted administrative clients until the upgrade can be completed.
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