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Global phishing Financial Services, Technology, Multiple Sectors CRITICAL 9h Global insider Education HIGH 1d Global supply_chain Software Development and Technology HIGH 1d Global apt Government/Critical Infrastructure CRITICAL 1d Global vulnerability Enterprise Software / Data Analytics CRITICAL 1d Global vulnerability Artificial Intelligence and Technology HIGH 1d Global general Technology and Artificial Intelligence MEDIUM 1d Global general Technology and Artificial Intelligence HIGH 1d Global vulnerability Higher Education CRITICAL 2d Global data_breach Government HIGH 2d Global phishing Financial Services, Technology, Multiple Sectors CRITICAL 9h Global insider Education HIGH 1d Global supply_chain Software Development and Technology HIGH 1d Global apt Government/Critical Infrastructure CRITICAL 1d Global vulnerability Enterprise Software / Data Analytics CRITICAL 1d Global vulnerability Artificial Intelligence and Technology HIGH 1d Global general Technology and Artificial Intelligence MEDIUM 1d Global general Technology and Artificial Intelligence HIGH 1d Global vulnerability Higher Education CRITICAL 2d Global data_breach Government HIGH 2d Global phishing Financial Services, Technology, Multiple Sectors CRITICAL 9h Global insider Education HIGH 1d Global supply_chain Software Development and Technology HIGH 1d Global apt Government/Critical Infrastructure CRITICAL 1d Global vulnerability Enterprise Software / Data Analytics CRITICAL 1d Global vulnerability Artificial Intelligence and Technology HIGH 1d Global general Technology and Artificial Intelligence MEDIUM 1d Global general Technology and Artificial Intelligence HIGH 1d Global vulnerability Higher Education CRITICAL 2d Global data_breach Government HIGH 2d
Vulnerabilities

CVE-2026-35665

Medium
CWE-405 — Weakness Type
Published: Apr 10, 2026  ·  Modified: Apr 13, 2026  ·  Source: NVD
CVSS v3
5.3
🔗 NVD Official
📄 Description (English)

OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.

🤖 AI Executive Summary

CVE-2026-35665 is a resource exhaustion vulnerability in OpenClaw's Feistel webhook handler that allows unauthenticated attackers to send slow HTTP POST requests with permissive size and timeout limits before signature verification, potentially blocking legitimate webhook deliveries. Organizations using OpenClaw before version 2026.3.24 are vulnerable to denial-of-service attacks targeting their webhook infrastructure.

📄 Description (Arabic)

تحتوي ثغرة CVE-2026-35665 على حد أقصى غير محدود بشكل كافٍ بمقدار 1 ميجابايت ومهلة زمنية مدتها 30 ثانية في معالج webhook Feishu قبل التحقق من التوقيع الرقمي. يمكن لمهاجم غير مصرح به إرسال طلبات HTTP POST بطيئة متزامنة لاستنزاف موارد الخادم وحجب تسليم webhook الشرعي.

🤖 ملخص تنفيذي (AI)

CVE-2026-35665 represents a resource exhaustion flaw in OpenClaw's Feistel webhook handler where unauthenticated attackers can exploit permissive request limits to exhaust server connections through slow HTTP POST requests. This incomplete fix for a previous vulnerability allows attackers to block legitimate webhook deliveries and disrupt service availability.

🤖 AI Intelligence Analysis Analyzed: May 30, 2026 04:36
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
telecom government banking
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade OpenClaw to version 2026.3.24 or later immediately. Implement rate limiting and connection timeouts at the reverse proxy or load balancer level. Add IP-based access controls to restrict webhook endpoint access to known Feishu IP ranges. Monitor webhook endpoint for unusual connection patterns and slow requests. Consider implementing request size validation and stricter timeout policies before signature verification.
🔧 خطوات المعالجة (العربية)
قم بترقية OpenClaw إلى الإصدار 2026.3.24 أو أحدث فوراً. طبق تحديد معدل الطلبات ومهلات الاتصال على مستوى الخادم الوكيل أو موازن التحميل. أضف عناصم تحكم في الوصول بناءً على عنوان IP لتقييد وصول نقطة نهاية webhook إلى نطاقات IP المعروفة من Feishu. راقب نقطة نهاية webhook للكشف عن أنماط الاتصال غير العادية والطلبات البطيئة. فكر في تطبيق التحقق من حجم الطلب وسياسات المهلة الزمنية الأكثر صرامة قبل التحقق من التوقيع.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1 5.2
🔵 SAMA CSF
CC-6.1 CC-6.2
🟡 ISO 27001:2022
A.12.6.1 A.13.1.1
📊 CVSS Score
5.3
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityL — Low / Local
📋 Quick Facts
Severity Medium
CVSS Score5.3
CWECWE-405
EPSS0.08%
Exploit No
Patch ✗ No
Published 2026-04-10
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-405
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