Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From 3.6.5 to 4.0.4, an unchecked array index in the pod informer's podGCFromPod() function causes a controller-wide panic when a workflow pod carries a malformed workflows.argoproj.io/pod-gc-strategy annotation. Because the panic occurs inside an informer goroutine (outside the controller's recover() scope), it crashes the entire controller process. The poisoned pod persists across restarts, causing a crash loop that halts all workflow processing until the pod is manually deleted. This vulnerability is fixed in 4.0.5 and 3.7.14.
Problem types
CWE-129: Improper Validation of Array Index
Product status
>= 3.7.0, < 3.7.14
>= 3.6.5, <= 3.6.19
References
github.com/...kflows/security/advisories/GHSA-5jv8-h7qh-rf5p
github.com/...kflows/security/advisories/GHSA-5jv8-h7qh-rf5p