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Vulnerabilities

CVE-2026-35212

Medium
CWE-79 — Weakness Type
Published: Jun 2, 2026  ·  Modified: Jun 5, 2026  ·  Source: NVD
CVSS v3
6.1
🔗 NVD Official
📄 Description (English)

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Versions prior to 7.260227.0 are vulnerable to XSS in the rendering of email-message observable body data. The content of the body field isn't appropriately sanitized when being rendered. Does require user interaction but could be exploited by someone sharing stix or any of the ingester. This could lead to CSRF and then large scale session theft. Version 7.260227.0 contains a fix.

🤖 AI Executive Summary

OpenCTI versions prior to 7.260227.0 contain a stored XSS vulnerability in email-message observable body rendering that could enable CSRF attacks and session theft. While requiring user interaction, the vulnerability poses significant risk when threat intelligence is shared via STIX files or ingester mechanisms. Organizations using OpenCTI for threat intelligence management should prioritize immediate patching to version 7.260227.0 or later.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Jun 5, 2026 16:18
🇸🇦 Saudi Arabia Impact Assessment
Saudi government agencies (NCA, NCSC), banking sector (SAMA-regulated institutions), and critical infrastructure operators (ARAMCO, SEC) relying on OpenCTI for threat intelligence aggregation face elevated risk. The vulnerability could compromise threat intelligence sharing networks within Saudi Arabia's cybersecurity ecosystem. Telecom operators (STC, Mobily) using OpenCTI for security operations may experience session hijacking of analysts accessing shared threat data. Healthcare sector (MOH) utilizing threat intelligence platforms could face unauthorized access to sensitive security information.
🏢 Affected Saudi Sectors
Government (NCA, NCSC) Banking (SAMA-regulated institutions) Energy (ARAMCO, SEC) Telecommunications (STC, Mobily) Healthcare (MOH) Critical Infrastructure Cybersecurity Operations Centers
⚖️ Saudi Risk Score (AI)
6.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all OpenCTI instances in your environment and document their versions
2. Restrict access to OpenCTI to trusted internal networks only
3. Disable email-message observable ingestion temporarily if possible
4. Review access logs for suspicious STIX file uploads or shares

Patching Guidance:
1. Upgrade to OpenCTI version 7.260227.0 or later immediately
2. Test patches in non-production environments first
3. Implement staged rollout across your infrastructure

Compensating Controls (if immediate patching not possible):
1. Implement Web Application Firewall (WAF) rules to detect XSS patterns in observable data
2. Apply Content Security Policy (CSP) headers to restrict script execution
3. Enforce multi-factor authentication for all OpenCTI users
4. Monitor for suspicious JavaScript execution in browser consoles
5. Implement session timeout policies (15-30 minutes)
6. Use browser security extensions to block inline scripts

Detection Rules:
1. Monitor for POST requests to observable endpoints containing script tags or event handlers
2. Alert on unusual CSRF token usage patterns
3. Track session creation from unexpected geographic locations
4. Monitor for bulk session token generation
5. Log all STIX file uploads and ingestion activities
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع مثيلات OpenCTI في بيئتك وقثق إصداراتها
2. قيد الوصول إلى OpenCTI للشبكات الداخلية الموثوقة فقط
3. عطل استيعاب رسالة البريد الإلكتروني مؤقتاً إن أمكن
4. راجع سجلات الوصول للتحميلات أو المشاركات المريبة لملفات STIX

إرشادات الترقية:
1. قم بالترقية إلى OpenCTI الإصدار 7.260227.0 أو أحدث فوراً
2. اختبر التصحيحات في بيئات غير الإنتاج أولاً
3. نفذ التطبيق على مراحل عبر البنية التحتية الخاصة بك

الضوابط البديلة (إذا لم يكن الترقية الفورية ممكنة):
1. تطبيق قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن أنماط XSS في بيانات الملاحظات
2. تطبيق رؤوس سياسة أمان المحتوى (CSP) لتقييد تنفيذ البرامج النصية
3. فرض المصادقة متعددة العوامل لجميع مستخدمي OpenCTI
4. مراقبة تنفيذ JavaScript المريب في وحدات تحكم المتصفح
5. تطبيق سياسات انتهاء الجلسة (15-30 دقيقة)
6. استخدام امتدادات أمان المتصفح لحظر البرامج النصية المضمنة

قواعد الكشف:
1. مراقبة طلبات POST إلى نقاط نهاية الملاحظات التي تحتوي على علامات البرامج النصية أو معالجات الأحداث
2. تنبيه على أنماط استخدام رموز CSRF غير العادية
3. تتبع إنشاء الجلسة من مواقع جغرافية غير متوقعة
4. مراقبة توليد رموز جلسة مجموعة
5. تسجيل جميع أنشطة تحميل وابتلاع ملفات STIX
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies ECC 2024 A.6.2.1 - User Authentication ECC 2024 A.6.2.2 - User Access Management ECC 2024 A.8.2.3 - Segregation of Duties ECC 2024 A.12.2.1 - Event Logging ECC 2024 A.12.4.1 - Recording User Activities
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Software Inventory SAMA CSF PR.AC-1 - Access Control SAMA CSF PR.AC-4 - Access Rights Management SAMA CSF DE.CM-1 - Network Monitoring SAMA CSF DE.AE-1 - Anomalies Detection
🟡 ISO 27001:2022
ISO 27001:2022 A.5.3 - Segregation of Duties ISO 27001:2022 A.6.2 - User Registration and De-registration ISO 27001:2022 A.8.2 - Privileged Access Rights ISO 27001:2022 A.8.3 - Information Access Restriction ISO 27001:2022 A.12.4 - Logging ISO 27001:2022 A.14.2 - Secure Development Policy
🟣 PCI DSS v4.0.1
PCI DSS 6.5.7 - Cross-site scripting (XSS) PCI DSS 7.1 - Limit access to system components PCI DSS 8.1 - User identification and authentication PCI DSS 10.2 - Implement automated audit trails
📦 Affected Products / CPE 1 entries
citeum:opencti
📊 CVSS Score
6.1
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionR — Required
ScopeC — Changed
ConfidentialityL — Low / Local
IntegrityL — Low / Local
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score6.1
CWECWE-79
EPSS0.05%
Exploit No
Patch ✗ No
Published 2026-06-02
Source Feed nvd
Views 1
🇸🇦 Saudi Risk Score
6.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-79
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