📄 Description (English)
Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerability via symlink allows to read arbitrary files outside model or user-provided directory. This issue has been patched in version 1.21.0.
🤖 AI Executive Summary
CVE-2026-27489 is a path traversal vulnerability in ONNX versions prior to 1.21.0 that allows attackers to read arbitrary files through symlink manipulation. With a CVSS score of 7.5 and publicly available exploits, this poses a significant risk to organizations using ONNX for machine learning operations. Immediate patching to version 1.21.0 or later is critical to prevent unauthorized data access.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 3, 2026 17:30
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations leveraging ONNX for AI/ML initiatives face significant risk, particularly in: (1) Banking sector (SAMA-regulated institutions) using ML for fraud detection and risk assessment; (2) Government agencies (NCA oversight) implementing AI for security and administrative systems; (3) Healthcare providers using ML models for diagnostics; (4) Energy sector (ARAMCO, utilities) deploying predictive analytics; (5) Telecommunications (STC, Mobily) using ONNX for network optimization. The vulnerability could expose sensitive financial data, personal health information, critical infrastructure parameters, and proprietary ML models.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Research and Academia
Manufacturing and Industrial
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running ONNX versions prior to 1.21.0 using software inventory tools
2. Isolate affected systems from production networks if exploitation is suspected
3. Review access logs for suspicious file access patterns
PATCHING GUIDANCE:
1. Upgrade ONNX to version 1.21.0 or later immediately
2. Test patches in non-production environments first
3. Validate ML model functionality post-upgrade
4. Implement staged rollout for critical systems
COMPENSATING CONTROLS (if immediate patching not possible):
1. Restrict file system permissions on directories containing ONNX models
2. Implement strict input validation for model paths
3. Disable symlink resolution in ONNX configuration if available
4. Run ONNX processes with minimal required privileges
5. Monitor for CWE-23 exploitation attempts
DETECTION RULES:
1. Monitor for unusual file access patterns outside designated model directories
2. Alert on symlink creation attempts in ONNX working directories
3. Track failed file access attempts with path traversal indicators (../, ..\)
4. Monitor process execution of ONNX with suspicious command-line arguments
5. Log all file operations on sensitive directories containing models or data
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل إصدارات ONNX السابقة للإصدار 1.21.0 باستخدام أدوات جرد البرامج
2. عزل الأنظمة المتأثرة عن شبكات الإنتاج إذا كان هناك اشتباه في الاستغلال
3. مراجعة سجلات الوصول للبحث عن أنماط وصول ملفات مريبة
إرشادات التصحيح:
1. ترقية ONNX إلى الإصدار 1.21.0 أو أحدث على الفور
2. اختبار التصحيحات في بيئات غير الإنتاج أولاً
3. التحقق من وظائف نموذج ML بعد الترقية
4. تنفيذ طرح مرحلي للأنظمة الحرجة
الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكنًا):
1. تقييد أذونات نظام الملفات على الدلائل التي تحتوي على نماذج ONNX
2. تنفيذ التحقق الصارم من صحة مسارات النموذج
3. تعطيل دقة الروابط الرمزية في تكوين ONNX إن أمكن
4. تشغيل عمليات ONNX بأقل صلاحيات مطلوبة
5. مراقبة محاولات استغلال CWE-23
قواعد الكشف:
1. مراقبة أنماط الوصول غير العادية للملفات خارج دلائل النموذج المعينة
2. تنبيهات عند محاولات إنشاء روابط رمزية في دلائل عمل ONNX
3. تتبع محاولات الوصول الفاشلة للملفات مع مؤشرات اجتياز المسار
4. مراقبة تنفيذ عمليات ONNX مع حجج سطر أوامر مريبة
5. تسجيل جميع عمليات الملفات على الدلائل الحساسة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information Security Policies
ECC 2024 A.5.2.1 - Access Control
ECC 2024 A.5.3.1 - Cryptography and Data Protection
ECC 2024 A.5.4.1 - Physical and Environmental Security
ECC 2024 A.6.1.1 - Incident Management
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Software Inventory
SAMA CSF PR.AC-1 - Access Control
SAMA CSF PR.PT-1 - Security Configuration Management
SAMA CSF DE.CM-1 - System Monitoring
SAMA CSF RS.MI-1 - Incident Response
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for Information Security
ISO 27001:2022 A.5.2 - Information Security Roles and Responsibilities
ISO 27001:2022 A.6.1 - Screening
ISO 27001:2022 A.8.1 - User Endpoint Devices
ISO 27001:2022 A.8.3 - Access Control
ISO 27001:2022 A.12.6 - Change Management
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches
PCI DSS 6.3.1 - Vulnerability Management
PCI DSS 10.3 - Logging and Monitoring
📦 Affected Products / CPE 1 entries
linuxfoundation:onnx