📄 Description (English)
Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
🤖 AI Executive Summary
CVE-2026-4713 is a high-severity vulnerability in Mozilla Firefox and Thunderbird affecting versions before 149 and ESR 140.9, caused by incorrect boundary conditions in the Graphics component. This memory safety issue could allow attackers to cause denial of service or potentially execute arbitrary code through specially crafted graphics content. No public exploit is currently available, but the vulnerability affects widely-used applications across Saudi organizations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 30, 2026 17:14
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi government entities, financial institutions, and enterprises relying on Firefox and Thunderbird for secure communications. Government agencies under NCA oversight, SAMA-regulated banks, and healthcare organizations using these applications for email and web access are particularly vulnerable. The Graphics component vulnerability could be exploited through malicious websites or email attachments, affecting both desktop and organizational security postures. STC and other telecom providers may also face risks if these applications are used in their infrastructure or by employees.
🏢 Affected Saudi Sectors
Government
Banking and Financial Services
Healthcare
Energy and Utilities
Telecommunications
Education
Enterprise/Corporate
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all Firefox and Thunderbird installations across your organization, including ESR versions
2. Disable JavaScript rendering of complex graphics content as a temporary measure
3. Restrict access to untrusted websites and email attachments containing graphics
4. Monitor for suspicious graphics-related crashes or memory errors
Patching Guidance:
1. Update Firefox to version 149 or later immediately when available
2. Update Firefox ESR to version 140.9 or later
3. Update Thunderbird to version 149 or later
4. Enable automatic updates for all Mozilla products
Compensating Controls:
1. Implement web content filtering to block potentially malicious graphics sources
2. Deploy email gateway scanning with graphics content analysis
3. Use sandboxing solutions for untrusted content
4. Enforce browser isolation technologies for high-risk users
Detection Rules:
1. Monitor for Firefox/Thunderbird crashes with graphics-related stack traces
2. Alert on unusual memory allocation patterns in graphics rendering processes
3. Track failed graphics rendering operations and buffer overflow attempts
4. Monitor for CVE-2026-4713 exploitation attempts in web server and email logs
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع تثبيتات Firefox و Thunderbird عبر مؤسستك، بما في ذلك إصدارات ESR
2. قم بتعطيل عرض JavaScript لمحتوى الرسومات المعقدة كإجراء مؤقت
3. قيد الوصول إلى المواقع غير الموثوقة والمرفقات البريدية التي تحتوي على رسومات
4. راقب الأعطال المتعلقة بالرسومات أو أخطاء الذاكرة المريبة
إرشادات التصحيح:
1. قم بتحديث Firefox إلى الإصدار 149 أو أحدث فوراً عند توفره
2. قم بتحديث Firefox ESR إلى الإصدار 140.9 أو أحدث
3. قم بتحديث Thunderbird إلى الإصدار 149 أو أحدث
4. فعّل التحديثات التلقائية لجميع منتجات Mozilla
الضوابط البديلة:
1. تطبيق تصفية محتوى الويب لحجب مصادر الرسومات الضارة المحتملة
2. نشر فحص بوابة البريد الإلكتروني مع تحليل محتوى الرسومات
3. استخدام حلول الحماية الرملية للمحتوى غير الموثوق
4. فرض تقنيات عزل المتصفح للمستخدمين عالي المخاطر
قواعد الكشف:
1. راقب أعطال Firefox/Thunderbird مع تتبع الرسومات المتعلقة
2. تنبيهات على أنماط تخصيص الذاكرة غير العادية في عمليات عرض الرسومات
3. تتبع عمليات عرض الرسومات الفاشلة ومحاولات تجاوز المخزن المؤقت
4. راقب محاولات استغلال CVE-2026-4713 في سجلات خادم الويب والبريد الإلكتروني
📋 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.12.2.1 - Monitoring and logging of access
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management and Identification
SAMA CSF PR.IP-12 - Software Development and Quality Assurance
SAMA CSF DE.CM-1 - Detection and Analysis
🟡 ISO 27001:2022
ISO 27001:2022 A.12.2.1 - Monitoring and logging
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
ISO 27001:2022 A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patches and updates
PCI DSS 11.2 - Vulnerability scanning
🔗 References & Sources 5
🔗
🔗
https://bugzilla.mozilla.org/show_bug.cgi?id=2018113
security@mozilla.org
Permissions Required
🔗
https://www.mozilla.org/security/advisories/mfsa2026-20/
security@mozilla.org
Vendor Advisory
🔗
https://www.mozilla.org/security/advisories/mfsa2026-22/
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 2 entries
mozilla:firefox
mozilla:firefox