📄 Description (English)
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, the Sync Service's ConfigMap-backed provider (server/sync/sync_cm.go) performs zero authorization checks on all CRUD operations (create, read, update, delete). Any authenticated user — including those using fake Bearer tokens — can create, read, update, and delete Kubernetes ConfigMaps containing synchronization limits. This issue has been patched in version 4.0.5.
🤖 AI Executive Summary
Argo Workflows versions 4.0.0-4.0.5 contain a critical authorization bypass in the Sync Service's ConfigMap provider, allowing any authenticated user to perform unrestricted CRUD operations on synchronization ConfigMaps. This vulnerability enables attackers to manipulate workflow synchronization limits, potentially disrupting containerized workloads across Kubernetes clusters. The vulnerability is actively exploitable and patches are available.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 15, 2026 23:49
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations operating Kubernetes-based infrastructure for critical services face significant risk. Primary impact sectors include: (1) Banking/SAMA-regulated institutions using containerized payment processing and core banking systems; (2) Government/NCA entities deploying Argo Workflows for administrative automation; (3) ARAMCO and energy sector operations relying on container orchestration for SCADA/ICS integration; (4) Telecom providers (STC, Mobily) using Argo for network automation; (5) Healthcare institutions processing patient data through containerized workflows. The authorization bypass allows lateral movement and workflow manipulation without proper access controls, violating SAMA CSF governance requirements.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Energy and Utilities
Telecommunications
Healthcare
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
T1078 - Valid Accounts (authentication bypass with fake Bearer tokens)
T1098 - Account Manipulation (unauthorized ConfigMap modifications)
T1526 - Cloud Service Discovery (Kubernetes API enumeration)
T1562 - Impair Defenses (disabling synchronization limits)
T1565 - Data Manipulation (workflow configuration tampering)
T1531 - Account Access Removal (ConfigMap deletion attacks)
⚖️ Saudi Risk Score (AI)
8.7
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Argo Workflows deployments running versions 4.0.0-4.0.4 using: kubectl get deployment -A | grep argo-workflows
2. Restrict network access to Argo Workflows API servers to authorized users only
3. Review audit logs for unauthorized ConfigMap modifications: kubectl logs -n argo deployment/argo-workflows-server | grep ConfigMap
4. Revoke any suspicious Bearer tokens issued during the vulnerability window
PATCHING GUIDANCE:
1. Upgrade immediately to Argo Workflows 4.0.5 or later
2. Apply RBAC policies restricting ConfigMap access to service accounts with explicit need
3. Implement Pod Security Policies limiting container capabilities
COMPENSATING CONTROLS (if immediate patching delayed):
1. Deploy network policies restricting Argo API access to trusted namespaces
2. Implement admission controllers (ValidatingWebhookConfiguration) to block unauthorized ConfigMap modifications
3. Enable audit logging for all ConfigMap operations: auditLevel: RequestResponse
4. Monitor for suspicious sync ConfigMap access patterns
DETECTION RULES:
1. Alert on ConfigMap modifications in argo-workflows namespace by non-admin users
2. Monitor for Bearer token usage from unexpected source IPs
3. Track failed authorization attempts to Argo API endpoints
4. Flag rapid ConfigMap CRUD operations indicating automated exploitation
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نشرات Argo Workflows التي تعمل بالإصدارات 4.0.0-4.0.4 باستخدام: kubectl get deployment -A | grep argo-workflows
2. تقييد الوصول إلى خوادم API الخاصة بـ Argo Workflows للمستخدمين المصرح لهم فقط
3. مراجعة سجلات التدقيق للتعديلات غير المصرح بها على ConfigMap: kubectl logs -n argo deployment/argo-workflows-server | grep ConfigMap
4. إلغاء أي رموز Bearer المريبة الصادرة خلال نافذة الثغرة
إرشادات التصحيح:
1. الترقية فوراً إلى Argo Workflows 4.0.5 أو إصدار أحدث
2. تطبيق سياسات RBAC تقيد الوصول إلى ConfigMap لحسابات الخدمة ذات الحاجة الصريحة
3. تنفيذ سياسات أمان Pod تحد من قدرات الحاويات
الضوابط البديلة (إذا تأخر التصحيح الفوري):
1. نشر سياسات الشبكة تقيد وصول Argo API إلى مساحات الأسماء الموثوقة
2. تنفيذ متحكمات القبول (ValidatingWebhookConfiguration) لحظر تعديلات ConfigMap غير المصرح بها
3. تفعيل تسجيل التدقيق لجميع عمليات ConfigMap: auditLevel: RequestResponse
4. مراقبة أنماط الوصول المريبة إلى ConfigMap المزامنة
قواعد الكشف:
1. تنبيه عند تعديلات ConfigMap في مساحة الأسماء argo-workflows من قبل مستخدمين غير المسؤولين
2. مراقبة استخدام رموز Bearer من عناوين IP غير متوقعة
3. تتبع محاولات التفويض الفاشلة لنقاط نهاية Argo API
4. وضع علامة على عمليات ConfigMap CRUD السريعة التي تشير إلى استغلال آلي
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.9.2.1 - User access management and authentication controls
ECC 2024 A.9.2.5 - Access rights review and revocation
ECC 2024 A.12.4.1 - Event logging and monitoring
ECC 2024 A.14.2.1 - Change management procedures
🔵 SAMA CSF
Governance & Risk Management - Authorization and access control framework
Security Operations - Incident detection and response capabilities
Resilience - Business continuity for critical infrastructure
Third-party Risk Management - Container orchestration platform security
🟡 ISO 27001:2022
ISO 27001:2022 A.5.3 - Segregation of duties
ISO 27001:2022 A.8.2 - User registration and de-registration
ISO 27001:2022 A.8.3 - User access provisioning
ISO 27001:2022 A.8.4 - Access rights review
ISO 27001:2022 A.8.5 - Access rights removal
ISO 27001:2022 A.8.6 - Authentication information management
🟣 PCI DSS v4.0.1
PCI DSS 3.2.1 - Strong access control measures
PCI DSS 7.1 - Limit access to system components by business need
PCI DSS 8.2 - Ensure proper user authentication
PCI DSS 10.2 - Implement automated audit trails
🔗 References & Sources 4
🔗
https://github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36cc40597ad84881db1ab6
security-advisories@github.com
Patch
🔗
https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5
security-advisories@github.com
Release Notes
🔗
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76q
security-advisories@github.com
Exploit
Vendor Advisory
🔗
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76q
134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
📦 Affected Products / CPE 1 entries
argoproj:argo_workflows