CVE-2026-54526

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.

• CWE-284

• https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbdPatch
• https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662Patch
• https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15Product, Release Notes
• https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6Product, Release Notes
• https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwmExploit, Vendor Advisory
• https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwmExploit, Vendor Advisory

Published

Jul 16, 2026

Last Modified

Jul 30, 2026

Status

Analyzed

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