📄 Description (English)
A vulnerability was determined in trueleaf ApiFlow 0.9.7. The impacted element is the function validateUrlSecurity of the file packages/server/src/service/proxy/http_proxy.service.ts of the component URL Validation Handler. This manipulation causes server-side request forgery. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
🤖 AI Executive Summary
CVE-2026-4528 is a Server-Side Request Forgery (SSRF) vulnerability in trueleaf ApiFlow 0.9.7 affecting the URL validation handler with a CVSS score of 7.3. The vulnerability allows remote attackers to manipulate the validateUrlSecurity function to bypass security controls and access internal resources. With public disclosure and no patch currently available, this poses an immediate risk to organizations using ApiFlow in their infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 6, 2026 06:55
🇸🇦 Saudi Arabia Impact Assessment
This SSRF vulnerability poses significant risk to Saudi organizations using ApiFlow for API management and proxy services. Most critical impact on: (1) Banking sector (SAMA-regulated institutions) - potential unauthorized access to internal banking systems and payment gateways; (2) Government agencies (NCA oversight) - risk to internal administrative systems and classified networks; (3) Telecom operators (STC, Mobily) - exposure of internal network infrastructure; (4) Energy sector (ARAMCO, SEC) - potential access to operational technology networks; (5) Healthcare providers - unauthorized access to patient data systems. The vulnerability enables attackers to make requests to internal resources, potentially bypassing network segmentation and firewall controls.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Energy and Utilities
Healthcare
Technology and IT Services
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all instances of trueleaf ApiFlow 0.9.7 across your infrastructure
2. Isolate affected systems from production networks if possible
3. Implement network segmentation to restrict outbound connections from ApiFlow instances
4. Monitor all outbound connections from ApiFlow servers for suspicious activity
COMPENSATING CONTROLS (until patch available):
1. Deploy Web Application Firewall (WAF) rules to detect and block SSRF patterns in URL parameters
2. Implement strict URL whitelist validation at the application layer
3. Disable or restrict access to internal IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 127.0.0.1)
4. Use network-level controls to prevent ApiFlow from accessing internal services
5. Implement egress filtering to block connections to internal resources
DETECTION RULES:
1. Monitor for requests containing internal IP addresses or localhost references in URL parameters
2. Alert on unusual outbound connections from ApiFlow service ports
3. Log and review all validateUrlSecurity function calls with suspicious parameters
4. Implement IDS/IPS signatures for SSRF attack patterns
PATCHING STRATEGY:
1. Contact trueleaf for patch availability timeline
2. Prepare isolated test environment for patch validation
3. Plan phased deployment with rollback procedures
4. Consider alternative API gateway solutions if patch timeline is extended
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع نسخ trueleaf ApiFlow 0.9.7 عبر البنية التحتية الخاصة بك
2. عزل الأنظمة المتأثرة عن شبكات الإنتاج إن أمكن
3. تطبيق تقسيم الشبكة لتقييد الاتصالات الصادرة من نسخ ApiFlow
4. مراقبة جميع الاتصالات الصادرة من خوادم ApiFlow للكشف عن النشاط المريب
عناصر التحكم التعويضية (حتى توفر التصحيح):
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن أنماط SSRF وحجبها
2. تطبيق التحقق من صحة قائمة بيضاء صارمة للعناوين على مستوى التطبيق
3. تعطيل أو تقييد الوصول إلى نطاقات IP الداخلية
4. استخدام عناصر التحكم على مستوى الشبكة لمنع ApiFlow من الوصول إلى الخدمات الداخلية
5. تطبيق تصفية الخروج لحجب الاتصالات بالموارد الداخلية
قواعد الكشف:
1. مراقبة الطلبات التي تحتوي على عناوين IP داخلية أو مراجع localhost في معاملات URL
2. التنبيه على الاتصالات الصادرة غير العادية من منافذ خدمة ApiFlow
3. تسجيل ومراجعة جميع استدعاءات دالة validateUrlSecurity بمعاملات مريبة
4. تطبيق توقيعات IDS/IPS لأنماط هجمات SSRF
استراتيجية التصحيح:
1. التواصل مع trueleaf للحصول على الجدول الزمني لتوفر التصحيح
2. تحضير بيئة اختبار معزولة للتحقق من صحة التصحيح
3. التخطيط للنشر المرحلي مع إجراءات التراجع
4. النظر في حلول بوابة API بديلة إذا تم تمديد الجدول الزمني للتصحيح
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.14.2.1 - Information security requirements for supplier relationships
ECC 2024 A.14.2.5 - Addressing information security in supplier agreements
ECC 2024 A.13.1.3 - Segregation of networks
ECC 2024 A.13.2.1 - Network access control
🔵 SAMA CSF
SAMA CSF ID.BE-3.2 - Organizational roles and responsibilities
SAMA CSF PR.AC-3 - Access enforcement
SAMA CSF PR.AC-4 - Access rights and privileges
SAMA CSF DE.CM-1 - Network monitoring
SAMA CSF RS.MI-2 - Incident response procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Supplier relationships
ISO 27001:2022 A.8.1 - User endpoint devices
ISO 27001:2022 A.8.2 - Privileged access rights
ISO 27001:2022 A.8.3 - Information access restriction
ISO 27001:2022 A.13.1 - Network security
🟣 PCI DSS v4.0.1
PCI DSS 1.3 - Firewall configuration standards
PCI DSS 6.2 - Security patches and updates
PCI DSS 11.3 - Penetration testing