📄 Description (English)
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
🤖 AI Executive Summary
CVE-2026-4695 is a high-severity vulnerability (CVSS 7.5) affecting Mozilla Firefox and Thunderbird due to incorrect boundary conditions in the Audio/Video Web Codecs component. This vulnerability could allow attackers to cause denial of service or potentially execute arbitrary code through specially crafted media files. No patch is currently available, requiring immediate mitigation strategies for affected organizations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 1, 2026 09:36
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi government entities, financial institutions, and enterprises relying on Firefox/Thunderbird for secure communications. SAMA-regulated banks and financial institutions are at risk if employees use affected browsers for email communications or accessing web-based banking portals. Government agencies under NCA oversight, telecommunications providers (STC, Mobily), and healthcare organizations using these browsers for critical operations face potential service disruption. The lack of available patches increases exposure window for Saudi organizations.
🏢 Affected Saudi Sectors
Banking and Financial Services (SAMA-regulated)
Government and Public Administration (NCA oversight)
Telecommunications (STC, Mobily, Zain)
Healthcare and Medical Services
Energy and Utilities (ARAMCO, SEC)
Education and Research Institutions
Enterprise and Corporate Organizations
🎯 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 (versions < 149 for Firefox, < 140.9 for ESR, < 149 for Thunderbird)
2. Disable or restrict access to untrusted media content and web-based video/audio streaming services until patching is available
3. Implement network-level controls to block malicious media files using content inspection
Compensating Controls:
1. Deploy web content filtering to restrict access to known malicious domains distributing exploit payloads
2. Implement application whitelisting to prevent unauthorized codec execution
3. Monitor for suspicious process behavior related to Firefox/Thunderbird using EDR solutions
4. Restrict Firefox/Thunderbird usage to trusted networks only; disable on public/guest networks
5. Disable hardware acceleration in Firefox settings (Preferences > Performance) to reduce codec exploitation surface
Detection Rules:
1. Monitor for Firefox/Thunderbird crashes or unexpected terminations
2. Alert on unusual memory consumption patterns in browser processes
3. Track failed media playback attempts followed by system instability
4. Monitor for CVE-2026-4695 exploitation attempts in proxy/firewall logs
Patching:
1. Subscribe to Mozilla security advisories for patch availability
2. Prepare deployment procedures for Firefox 149+ and Thunderbird 149+ immediately upon release
3. Test patches in isolated environment before enterprise rollout
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع تثبيتات Firefox و Thunderbird عبر المنظمة (الإصدارات < 149 لـ Firefox، < 140.9 لـ ESR، < 149 لـ Thunderbird)
2. تعطيل أو تقييد الوصول إلى محتوى الوسائط غير الموثوق به وخدمات البث المرئي/الصوتي عبر الويب حتى يتوفر التصحيح
3. تنفيذ عناصر تحكم على مستوى الشبكة لحظر ملفات الوسائط الضارة باستخدام فحص المحتوى
عناصر التحكم البديلة:
1. نشر تصفية محتوى الويب لتقييد الوصول إلى النطاقات المعروفة التي توزع حمولات الاستغلال
2. تنفيذ قائمة بيضاء للتطبيقات لمنع تنفيذ الترميز غير المصرح به
3. مراقبة السلوك المريب المتعلق بـ Firefox/Thunderbird باستخدام حلول EDR
4. تقييد استخدام Firefox/Thunderbird على الشبكات الموثوقة فقط؛ تعطيل على الشبكات العامة/الضيف
5. تعطيل تسريع الأجهزة في إعدادات Firefox (التفضيلات > الأداء) لتقليل سطح استغلال الترميز
قواعد الكشف:
1. مراقبة أعطال Firefox/Thunderbird أو الإنهاء غير المتوقع
2. تنبيهات على أنماط استهلاك الذاكرة غير العادية في عمليات المتصفح
3. تتبع محاولات تشغيل الوسائط الفاشلة متبوعة بعدم استقرار النظام
4. مراقبة محاولات استغلال CVE-2026-4695 في سجلات الوكيل/جدار الحماية
التصحيح:
1. الاشتراك في تنبيهات أمان Mozilla لتوفر التصحيح
2. تحضير إجراءات النشر لـ Firefox 149+ و Thunderbird 149+ فوراً عند الإصدار
3. اختبار التصحيحات في بيئة معزولة قبل النشر على مستوى المؤسسة
📋 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
SAMA CSF ID.RA-1 - Asset Management and Vulnerability Management
SAMA CSF PR.IP-12 - Security patch and update management
SAMA CSF DE.CM-1 - Detection and monitoring of anomalies
🟡 ISO 27001:2022
ISO 27001:2022 A.12.3.1 - Configuration management
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=2020030
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