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Vulnerabilities

CVE-2026-33129

Medium ⚡ Exploit Available
H3 is a minimal H(TTP) framework. Versions 2.0.1-beta.0 through 2.0.0-rc.8 contain a Timing Side-Channel vulnerability in the requireBasicAuth function due to the use of unsafe string comparison (!==)
CWE-208 — Weakness Type
Published: Mar 20, 2026  ·  Modified: Mar 23, 2026  ·  Source: NVD
CVSS v3
5.9
🔗 NVD Official
📄 Description (English)

H3 is a minimal H(TTP) framework. Versions 2.0.1-beta.0 through 2.0.0-rc.8 contain a Timing Side-Channel vulnerability in the requireBasicAuth function due to the use of unsafe string comparison (!==). This allows an attacker to deduce the valid password character-by-character by measuring the server's response time, effectively bypassing password complexity protections. This issue is fixed in version 2.0.1-rc.9.

🤖 AI Executive Summary

CVE-2026-33129 is a timing side-channel vulnerability in H3 HTTP framework versions 2.0.1-beta.0 through 2.0.0-rc.8 that allows attackers to bypass basic authentication by measuring response times to deduce passwords character-by-character. With an available exploit and CVSS 5.9 score, this poses a moderate but exploitable risk to Node.js-based applications. Organizations using affected H3 versions must upgrade immediately to 2.0.1-rc.9 or later to prevent credential compromise.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 24, 2026 16:19
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using H3 framework in Node.js applications face credential compromise risks, particularly affecting: (1) Banking sector (SAMA-regulated institutions) relying on basic auth for API endpoints; (2) Government agencies (NCA oversight) using H3 for internal services; (3) Telecom providers (STC, Mobily) with customer-facing APIs; (4) E-commerce and fintech startups leveraging H3 for rapid development. The timing side-channel allows attackers to systematically extract authentication credentials without triggering rate-limiting or account lockout mechanisms, enabling unauthorized access to sensitive systems and data.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications E-commerce and Retail Healthcare Energy and Utilities Technology and Software Development
⚖️ Saudi Risk Score (AI)
6.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Node.js applications using H3 framework versions 2.0.1-beta.0 through 2.0.0-rc.8 via dependency scanning (npm audit, Snyk, or similar tools)
2. Isolate affected systems from production if possible or implement network-level access controls
3. Review authentication logs for suspicious timing patterns or failed authentication attempts

PATCHING GUIDANCE:
1. Upgrade H3 to version 2.0.1-rc.9 or later immediately: npm update h3@latest
2. Test upgraded applications in staging environment before production deployment
3. Restart all Node.js services using H3 after patching

COMPENSATING CONTROLS (if immediate patching not possible):
1. Implement rate limiting on authentication endpoints (e.g., max 5 attempts per minute per IP)
2. Deploy Web Application Firewall (WAF) rules to detect timing-based attacks
3. Use constant-time comparison libraries for authentication (e.g., crypto.timingSafeEqual in Node.js)
4. Implement multi-factor authentication (MFA) to reduce password-only reliance
5. Monitor response times for anomalous patterns indicating timing attacks

DETECTION RULES:
1. Alert on multiple failed authentication attempts from single IP within short timeframe
2. Monitor for requests with systematically varying payload lengths to authentication endpoints
3. Detect unusual response time variance in authentication responses (statistical analysis)
4. Log and alert on any H3 version < 2.0.1-rc.9 in production environments
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع تطبيقات Node.js التي تستخدم إصدارات H3 من 2.0.1-beta.0 إلى 2.0.0-rc.8 من خلال فحص التبعيات (npm audit أو Snyk)
2. عزل الأنظمة المتأثرة عن الإنتاج أو تطبيق عناصر تحكم الوصول على مستوى الشبكة
3. مراجعة سجلات المصادقة للبحث عن أنماط توقيت مريبة أو محاولات مصادقة فاشلة

إرشادات التصحيح:
1. ترقية H3 إلى الإصدار 2.0.1-rc.9 أو أحدث فوراً: npm update h3@latest
2. اختبار التطبيقات المرقاة في بيئة التجريب قبل نشرها في الإنتاج
3. إعادة تشغيل جميع خدمات Node.js التي تستخدم H3 بعد التصحيح

عناصر التحكم البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. تطبيق تحديد معدل على نقاط نهاية المصادقة (مثل 5 محاولات كحد أقصى في الدقيقة لكل عنوان IP)
2. نشر قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن هجمات التوقيت
3. استخدام مكتبات المقارنة ذات الوقت الثابت للمصادقة (مثل crypto.timingSafeEqual في Node.js)
4. تطبيق المصادقة متعددة العوامل (MFA) لتقليل الاعتماد على كلمة المرور وحدها
5. مراقبة أوقات الاستجابة للكشف عن أنماط غير عادية تشير إلى هجمات التوقيت

قواعد الكشف:
1. تنبيه عند محاولات مصادقة فاشلة متعددة من عنوان IP واحد في إطار زمني قصير
2. مراقبة الطلبات ذات أطوال الحمولة المتغيرة بشكل منهجي لنقاط نهاية المصادقة
3. الكشف عن تباين غير عادي في أوقات استجابة المصادقة (التحليل الإحصائي)
4. تسجيل والتنبيه عند أي إصدار H3 < 2.0.1-rc.9 في بيئات الإنتاج
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.9.2.1 - User authentication mechanisms ECC 2024 A.9.2.5 - Access control for authentication systems ECC 2024 A.14.2.1 - Secure development practices
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Software asset management SAMA CSF PR.AC-1 - Access control policy and procedures SAMA CSF PR.AC-6 - Authentication and authorization mechanisms
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Authentication ISO 27001:2022 A.8.3 - Cryptography ISO 27001:2022 A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0.1
PCI DSS 2.1 - Change default passwords PCI DSS 6.2 - Security patches for system components PCI DSS 8.2.3 - Strong authentication mechanisms
📦 Affected Products / CPE 9 entries
h3:h3:2.0.0
h3:h3:2.0.1
h3:h3:2.0.1
h3:h3:2.0.1
h3:h3:2.0.1
h3:h3:2.0.1
h3:h3:2.0.1
h3:h3:2.0.1
h3:h3:2.0.1
📊 CVSS Score
5.9
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack VectorN — None / Network
Attack ComplexityH — High
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score5.9
CWECWE-208
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-03-20
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
6.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
exploit-available patch-available CWE-208
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