CVE WatchJul 15, 2026

CVE-2026-40886

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 unc

CVSS

7.7

High

EPSS

0.4%

p30

KEV

—

Exploit Today

0-100

Published: Apr 23, 2026 · Last modified: Jul 15, 2026 · CWE-129 · CWE-1285

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-07-082026-08-04

Technical 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.

Official references

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