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Vulnerabilities

CVE-2026-27141

High
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
CWE-476 — Weakness Type
Published: Feb 26, 2026  ·  Modified: Mar 5, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic

🤖 AI Executive Summary

CVE-2026-27141 is a denial-of-service vulnerability in HTTP/2 implementations caused by missing nil checks when processing malformed frame types (0x0a-0x0f). Exploitation causes server panic and service disruption. While no public exploit exists, the vulnerability is easily reproducible and poses significant risk to web infrastructure. Immediate patching is critical for organizations running affected HTTP/2 servers.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 3, 2026 20:45
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi Arabia's critical digital infrastructure. Banking sector (SAMA-regulated institutions, payment gateways) faces service disruption risks affecting transaction processing. Government entities (NCA, CITC) relying on HTTP/2 for e-services and digital platforms are vulnerable. Telecom operators (STC, Mobily, Zain) providing cloud and CDN services could experience widespread outages. Energy sector (ARAMCO, SEC) digital systems and healthcare providers using HTTP/2 APIs are at risk. E-commerce platforms and fintech companies operating in Saudi Arabia could face significant business continuity impacts.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Energy and Utilities Healthcare E-commerce and Retail Fintech and Payment Processing
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all HTTP/2 servers in your infrastructure (web servers, load balancers, API gateways, CDNs)
2. Implement network-level filtering to block malformed HTTP/2 frames (0x0a-0x0f) at WAF/IDS level
3. Enable HTTP/2 connection monitoring and alerting for unexpected frame types

PATCHING GUIDANCE:
1. Apply vendor patches immediately for all affected HTTP/2 implementations (Go, Node.js, nginx, Apache, etc.)
2. Test patches in staging environment before production deployment
3. Prioritize critical systems: payment gateways, government portals, telecom infrastructure
4. Schedule patching during maintenance windows with minimal business impact

COMPENSATING CONTROLS (if patch unavailable):
1. Disable HTTP/2 temporarily and revert to HTTP/1.1 if operationally feasible
2. Implement rate limiting on HTTP/2 frame processing
3. Deploy WAF rules to detect and block suspicious frame sequences
4. Increase server resource limits and implement auto-restart mechanisms

DETECTION RULES:
1. Monitor for HTTP/2 frames with type values 0x0a-0x0f in network traffic
2. Alert on unexpected server panics or restarts correlated with HTTP/2 traffic
3. Log all malformed HTTP/2 connection attempts
4. Implement IDS signatures for malformed HTTP/2 frame detection
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع خوادم HTTP/2 في البنية التحتية (خوادم الويب، موازنات التحميل، بوابات API، شبكات التوزيع)
2. تطبيق تصفية على مستوى الشبكة لحجب إطارات HTTP/2 المعيبة (0x0a-0x0f) على مستوى WAF/IDS
3. تفعيل مراقبة التنبيهات لأنواع الإطارات غير المتوقعة

إرشادات التصحيح:
1. تطبيق تصحيحات البائع فوراً لجميع تطبيقات HTTP/2 المتأثرة
2. اختبار التصحيحات في بيئة التطوير قبل النشر في الإنتاج
3. إعطاء الأولوية للأنظمة الحرجة: بوابات الدفع، البوابات الحكومية، البنية التحتية للاتصالات
4. جدولة التصحيحات خلال نوافذ الصيانة

الضوابط البديلة:
1. تعطيل HTTP/2 مؤقتاً والعودة إلى HTTP/1.1 إذا كان ممكناً
2. تطبيق حد أقصى لمعدل معالجة إطارات HTTP/2
3. نشر قواعد WAF لكشف وحجب تسلسلات الإطارات المريبة
4. زيادة حدود موارد الخادم وتطبيق آليات إعادة التشغيل التلقائي

قواعد الكشف:
1. مراقبة إطارات HTTP/2 بقيم نوع 0x0a-0x0f في حركة المرور
2. التنبيه على توقف الخادم غير المتوقع المرتبط بحركة HTTP/2
3. تسجيل جميع محاولات الاتصال المعيبة
4. تطبيق توقيعات IDS للكشف عن الإطارات المعيبة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities ECC 2024 A.12.2.1 - Change management procedures ECC 2024 A.12.3.1 - Segregation of development, test and production environments
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.IP-12 - System and information integrity DE.CM-8 - Vulnerability scans
🟡 ISO 27001:2022
A.12.2.1 - Change management A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates Requirement 11.2 - Vulnerability scanning
📊 CVSS Score
7.5
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.5
CWECWE-476
Exploit No
Patch ✓ Yes
Published 2026-02-26
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
8.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-476
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