---
id: CVE-2026-93991
title: >-
  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
summary: >-
  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. A…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-639
vendor: argoproj
product: argo-workflows
affected:
  - argo-workflows >= 4.1.0 < 4.1.4
published: '2026-09-19'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:25:55.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93991'
references:
  - url: 'https://github.com/argoproj/argo-workflows'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9
    label: disclosure@vulncheck.com
  - url: 'https://github.com/argoproj/argo-workflows/releases/tag/v4.1.4'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00436
epssPercentile: 0.35254
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T16:23:00.522517Z'
ingestedAt: '2026-09-19T23:10:34.245Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.