Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector (CVE-2026-93991) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93991

Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector

Answer in brief

CVE-2026-93991 records a Unknown severity vulnerability in Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector. 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 Sep 19, 2026Updated Sep 19, 2026Source checked Sep 20, 2026First seen by HOL Sep 19, 2026Material review Sep 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=4.1.0 <4.1.4	4.1.4

Recommended response

Check inventory. Check lockfiles and deployed manifests for argoproj/argo-workflows.
Review the reported fix. Update argoproj/argo-workflows to 4.1.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 19, 2026

Sources and claim methodology

Upstream source description

Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a negated namespace field selector to retrieve archived workflows from all other namespaces, exposing spec arguments, parameter values, and annotations.

Quoted source text, attributed separately from HOL analysis.