📄 Description (English)
Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
🤖 AI Executive Summary
CVE-2026-4718 is a high-severity undefined behavior vulnerability in WebRTC signaling affecting Firefox and Thunderbird browsers. With a CVSS score of 8.1, this vulnerability could enable remote code execution or denial of service through malicious WebRTC communications. No patch is currently available, requiring immediate compensating controls in Saudi organizations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 26, 2026 04:32
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi government agencies, banking sector (SAMA-regulated institutions), and telecommunications companies (STC, Mobily) that rely on Firefox/Thunderbird for secure communications. Government entities using these browsers for classified communications face elevated risk. Financial institutions processing payments or sensitive data through WebRTC-enabled platforms are at risk. Healthcare organizations and critical infrastructure operators using these browsers for remote communications are vulnerable to service disruption and potential data compromise.
🏢 Affected Saudi Sectors
Government and Public Administration
Banking and Financial Services
Telecommunications
Healthcare
Energy and Utilities
Critical Infrastructure
Defense and Security
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Disable WebRTC in Firefox/Thunderbird: Set media.peerconnection.enabled to false in about:config
2. Block WebRTC at network level using firewall rules to restrict STUN/TURN traffic (UDP ports 3478-3479, TCP 443)
3. Restrict browser usage to non-critical communications until patches are available
4. Implement browser isolation technology for high-risk users
DETECTION:
5. Monitor for WebRTC signaling traffic anomalies using IDS/IPS signatures
6. Log all WebRTC connection attempts and analyze for suspicious patterns
7. Alert on Firefox/Thunderbird processes attempting unexpected network connections
COMPENSATING CONTROLS:
8. Deploy endpoint detection and response (EDR) solutions to monitor browser process behavior
9. Implement application whitelisting to restrict browser execution
10. Use network segmentation to isolate systems running vulnerable browsers
11. Monitor for exploitation indicators: browser crashes, unexpected process spawning, memory corruption patterns
PATCHING STRATEGY:
12. Prepare for immediate deployment of Firefox 149+ and Thunderbird 149+ when available
13. Maintain inventory of all Firefox/Thunderbird installations across organization
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تعطيل WebRTC في Firefox/Thunderbird: اضبط media.peerconnection.enabled على false في about:config
2. حظر WebRTC على مستوى الشبكة باستخدام قواعد جدار الحماية لتقييد حركة STUN/TURN (منافذ UDP 3478-3479، TCP 443)
3. تقييد استخدام المتصفح للاتصالات غير الحرجة حتى توفر التصحيحات
4. تطبيق تكنولوجيا عزل المتصفح للمستخدمين عالي المخاطر
الكشف:
5. مراقبة شذوذ حركة WebRTC Signaling باستخدام توقيعات IDS/IPS
6. تسجيل جميع محاولات اتصال WebRTC وتحليل الأنماط المريبة
7. التنبيه على عمليات Firefox/Thunderbird التي تحاول إجراء اتصالات شبكة غير متوقعة
الضوابط التعويضية:
8. نشر حلول الكشف والاستجابة على نقاط النهاية (EDR) لمراقبة سلوك عملية المتصفح
9. تطبيق القائمة البيضاء للتطبيقات لتقييد تنفيذ المتصفح
10. استخدام تقسيم الشبكة لعزل الأنظمة التي تقوم بتشغيل المتصفحات الضعيفة
11. مراقبة مؤشرات الاستغلال: تعطل المتصفح، توليد العمليات غير المتوقعة، أنماط تلف الذاكرة
استراتيجية التصحيح:
12. التحضير للنشر الفوري لـ Firefox 149+ و Thunderbird 149+ عند توفرها
13. الحفاظ على جرد لجميع تثبيتات Firefox/Thunderbird عبر المنظمة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information security policies and procedures
ECC 2024 A.5.2.1 - User access management
ECC 2024 A.5.3.1 - Cryptography and secure communications
ECC 2024 A.5.4.1 - Physical and environmental security
ECC 2024 A.6.1.1 - Incident management and response
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Organizational context and risk management
SAMA CSF PR.DS-2 - Data security and protection
SAMA CSF PR.IP-1 - Information protection processes
SAMA CSF DE.CM-1 - Detection and monitoring
SAMA CSF RS.RP-1 - Response planning
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security
ISO 27001:2022 A.5.2 - Information security roles and responsibilities
ISO 27001:2022 A.6.1 - Screening
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
🟣 PCI DSS v4.0.1
PCI DSS 2.4 - Document and implement policies and procedures
PCI DSS 6.2 - Ensure security patches are installed
PCI DSS 11.2 - Run automated vulnerability scans
🔗 References & Sources 5
🔗
https://bugzilla.mozilla.org/show_bug.cgi?id=2014864
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
Vendor Advisory
🔗
https://www.mozilla.org/security/advisories/mfsa2026-24/
security@mozilla.org
Vendor Advisory
📦 Affected Products / CPE 4 entries
mozilla:firefox
mozilla:firefox
mozilla:thunderbird
mozilla:thunderbird