CVE-2026-40886
Fixed in a distro release EPSS <1%CVSS 7.7
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.
Products: argoproj argo-workflows, Red Hat OpenShift AI (RHOAI)
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | github.com/argoproj/argo-workflows | no fix |
| Go | github.com/argoproj/argo-workflows/v2 | no fix |
| Go | github.com/argoproj/argo-workflows/v3 | 3.7.14 |
| Go | github.com/argoproj/argo-workflows/v3 | no fix |
| Go | github.com/argoproj/argo-workflows/v4 | 4.0.5 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | argo-workflow-controller-3.6 | no fix |
| Chainguard | argo-workflow-controller-3.7 | 3.7.15-r2 |
| Chainguard | argo-workflow-controller-fips-3.6 | no fix |
| Chainguard | argo-workflow-controller-fips-3.7 | 3.7.15-r3 |
| Chainguard | argo-workflow-executor-3.6 | no fix |
| Chainguard | argo-workflow-executor-3.7 | 3.7.15-r2 |
| Chainguard | argo-workflow-executor-fips-3.6 | no fix |
| Chainguard | argo-workflow-executor-fips-3.7 | 3.7.15-r3 |
| Chainguard | argo-workflows-3.6 | no fix |
| Chainguard | argo-workflows-3.7 | 3.7.15-r2 |
| Chainguard | argo-workflows-fips-3.6 | no fix |
| Chainguard | argo-workflows-fips-3.7 | 3.7.15-r3 |
| Chainguard | kubeflow-pipelines-apiserver | 2.16.0-r18 |
| Chainguard | kubeflow-pipelines-cache_server | 2.16.0-r18 |
| Chainguard | kubeflow-pipelines-driver-fips | 2.16.1-r2 |
| Chainguard | kubeflow-pipelines-fips-launcher-v2 | 2.16.1-r1 |
| Chainguard | kubeflow-pipelines-persistence_agent | 2.16.0-r18 |
| Chainguard | kubeflow-pipelines-scheduledworkflow | 2.16.0-r18 |
| Wolfi | argo-workflow-controller-3.7 | 3.7.15-r2 |
| Wolfi | argo-workflow-executor-3.7 | 3.7.15-r2 |
| Wolfi | argo-workflows-3.7 | 3.7.15-r2 |
| Wolfi | kubeflow-pipelines-apiserver | 2.16.0-r18 |
| Wolfi | kubeflow-pipelines-cache_server | 2.16.0-r18 |
| Wolfi | kubeflow-pipelines-persistence_agent | 2.16.0-r18 |
| Wolfi | kubeflow-pipelines-scheduledworkflow | 2.16.0-r18 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 |