CVE-2026-40886 | BDVDB-2026-328645 Detail

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.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-04-23Record published in the CVE List.
2. Version 22026-07-15Most recent update recorded in the CVE List.