WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode (CVE-2026-31892) | HOL Guard CVE

High · CVSS 8.1CVE-2026-31892

WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode

Answer in brief

CVE-2026-31892 records a High severity (CVSS 8.1) vulnerability in WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode. The current sources do not mark it as known exploited. The current feed maps argoproj/argo-workflows (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 11, 2026Updated Jul 15, 2026Source checked Sep 19, 2026First seen by HOL Jul 15, 2026Material review Jul 15, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps argoproj/argo-workflows (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
argoproj/argo-workflowsgeneric	>= 4.0.0, < 4.0.2 \|\| >= 2.9.0, < 3.7.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for argoproj/argo-workflows.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Mar 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 15, 2026

Sources and claim methodology

Upstream source description

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From 2.9.0 to before 4.0.2 and 3.7.11, A user who can submit Workflows can completely bypass all security settings defined in a WorkflowTemplate by including a podSpecPatch field in their Workflow submission. This works even when the controller is configured with templateReferencing: Strict, which is specifically documented as a mechanism to restrict users to admin-approved templates. The podSpecPatch field on a submitted Workflow takes precedence over the referenced WorkflowTemplate during spec merging and is applied directly to the pod spec at creation time with no security validation. This vulnerability is fixed in 4.0.2 and 3.7.11.

Quoted source text, attributed separately from HOL analysis.