📄 Description (English)
Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
🤖 AI Executive Summary
CVE-2026-4706 is a high-severity vulnerability in Mozilla Firefox and Thunderbird's Canvas2D graphics component caused by incorrect boundary condition handling (CWE-754). With a CVSS score of 7.5, this vulnerability could allow attackers to cause denial of service or potentially execute arbitrary code through specially crafted canvas operations. No patch is currently available, requiring immediate compensating controls in Saudi organizations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 1, 2026 03:16
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi government entities, financial institutions, and enterprises relying on Firefox for secure communications. SAMA-regulated banks and financial institutions using Firefox for internal operations face potential data integrity risks. Government agencies under NCA oversight could experience service disruptions. Telecommunications sector (STC, Mobily) and energy sector (ARAMCO) employees using Firefox for business operations are at risk. Healthcare organizations using Firefox for patient data access could face confidentiality breaches. The lack of available patches increases exposure window for all sectors.
🏢 Affected Saudi Sectors
Banking and Financial Services (SAMA-regulated)
Government and Public Administration (NCA oversight)
Healthcare and Medical Services
Energy and Petroleum (ARAMCO, related entities)
Telecommunications (STC, Mobily, Zain)
Education and Research
Defense and Security
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all Firefox and Thunderbird installations across the organization, prioritizing critical systems
2. Disable Canvas2D functionality where possible through browser policies (about:config - disable canvas rendering)
3. Implement network-level restrictions on untrusted websites using web filtering and proxy controls
4. Monitor for suspicious canvas-related crashes or unexpected behavior in browser logs
Compensating Controls:
5. Deploy Content Security Policy (CSP) headers to restrict canvas usage: script-src 'self'; object-src 'none'
6. Implement browser isolation technology for high-risk users accessing untrusted content
7. Use application whitelisting to prevent exploitation payloads
8. Enable Enhanced Tracking Protection and disable JavaScript on untrusted sites
9. Restrict Firefox/Thunderbird usage to trusted internal networks only
10. Implement endpoint detection and response (EDR) with behavioral analysis for canvas-related anomalies
Patching Strategy:
11. Monitor Mozilla security advisories daily for patch release (expected Firefox 149, ESR 115.34, ESR 140.9)
12. Prepare rapid deployment procedures for emergency patches
13. Test patches in isolated environment before enterprise rollout
14. Establish rollback procedures if patches cause compatibility issues
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع تثبيتات Firefox و Thunderbird عبر المنظمة، مع إعطاء الأولوية للأنظمة الحرجة
2. تعطيل وظيفة Canvas2D حيث أمكن من خلال سياسات المتصفح (about:config - تعطيل عرض canvas)
3. تطبيق قيود على مستوى الشبكة على المواقع غير الموثوقة باستخدام تصفية الويب والتحكم بالوكيل
4. مراقبة الأعطال المتعلقة بـ canvas المريبة والسلوك غير المتوقع في سجلات المتصفح
الضوابط التعويضية:
5. نشر رؤوس سياسة أمان المحتوى (CSP) لتقييد استخدام canvas: script-src 'self'; object-src 'none'
6. تطبيق تقنية عزل المتصفح للمستخدمين عالي المخاطر الذين يصلون إلى محتوى غير موثوق
7. استخدام القائمة البيضاء للتطبيقات لمنع حمولات الاستغلال
8. تفعيل الحماية المحسّنة من التتبع وتعطيل JavaScript على المواقع غير الموثوقة
9. تقييد استخدام Firefox/Thunderbird على الشبكات الداخلية الموثوقة فقط
10. تطبيق كشف الأطراف النهائية والاستجابة (EDR) مع تحليل السلوك للشذوذ المتعلق بـ canvas
استراتيجية التصحيح:
11. مراقبة استشارات أمان Mozilla يومياً لإصدار التصحيح (متوقع Firefox 149، ESR 115.34، ESR 140.9)
12. تحضير إجراءات النشر السريع للتصحيحات الطارئة
13. اختبار التصحيحات في بيئة معزولة قبل النشر على مستوى المؤسسة
14. وضع إجراءات التراجع في حالة تسبب التصحيحات في مشاكل التوافق
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
ECC 2024 A.14.2.1 - Secure development policy
ECC 2024 A.12.3.1 - Configuration management
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Software, firmware, and information integrity mechanisms
DE.CM-8 - Vulnerability scans are performed
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.3.1 - Configuration management
A.12.2.1 - Change management procedures
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates
Requirement 6.1 - Vulnerability management program
🔗 References & Sources 6
🔗
🔗
https://bugzilla.mozilla.org/show_bug.cgi?id=2015091
security@mozilla.org
Permissions Required
🔗
https://www.mozilla.org/security/advisories/mfsa2026-20/
security@mozilla.org
Vendor Advisory
🔗
https://www.mozilla.org/security/advisories/mfsa2026-21/
security@mozilla.org
Vendor Advisory
🔗
https://www.mozilla.org/security/advisories/mfsa2026-22/
security@mozilla.org
Vendor Advisory
🔗
https://www.mozilla.org/security/advisories/mfsa2026-23/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-24/
security@mozilla.org
📦 Affected Products / CPE 3 entries
mozilla:firefox
mozilla:firefox
mozilla:firefox