CVE-2026-54526
Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverrides and SanitizeUserWorkflowSpec walk only the top-level fields of WorkflowSpec via reflection, and WorkflowSpec.ArtifactGC is allow-listed wholesale; the struct behind that field, WorkflowLevelArtifactGC, has a PodSpecPatch sub-field whose contents flow unmodified into util.ApplyPodSpecPatch on the artifact-GC pod, the same sink the original fix closed for WorkflowSpec.PodSpecPatch, so a user submitting a Workflow under templateReferencing: Strict or Secure (against a referenced WorkflowTemplate that declares an output artifact and setting spec.artifactGC.strategy: OnWorkflowCompletion) can still inject an arbitrary strategic merge patch into the artifact-GC pod, including hostPath volumes, privileged: true, arbitrary image and command, and hostNetwork: true, defeating the stated purpose of Strict/Secure reference mode. This issue is fixed in versions 3.7.15 and 4.0.6.
How to fix
- argoproj argo_workflows3.7.15, 4.0.6 or later
- github.com/argoproj/argo-workflows/v44.0.6 or later
- github.com/argoproj/argo-workflows/v33.7.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| argoproj argo_workflows | v < 3.7.15, 4.0.0 ≤ v < 4.0.6 | 3.7.15, 4.0.6 |
| github.com/argoproj/argo-workflows/v4Go | 4.0.0 ≤ v < 4.0.6 | 4.0.6 |
| github.com/argoproj/argo-workflows/v3Go | v < 3.7.15 | 3.7.15 |
| github.com/argoproj/argo-workflowsGo | v ≤ 2.5.3-rc4, No range specified | — |
| github.com/argoproj/argo-workflows/v2Go | No range specified | — |
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