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Global general Consumer Electronics and Retail MEDIUM 1h Global supply_chain Software Development and Technology HIGH 2h Global general Artificial Intelligence and Software Development LOW 3h Global general Artificial Intelligence and Cybersecurity MEDIUM 3h Global malware Software Development / Technology HIGH 3h Global vulnerability Information Technology HIGH 4h Global data_breach Water Utilities / Critical Infrastructure HIGH 4h Global general Cybersecurity Services HIGH 5h Global data_breach Pharmaceutical HIGH 5h Global vulnerability Technology, Artificial Intelligence CRITICAL 6h Global general Consumer Electronics and Retail MEDIUM 1h Global supply_chain Software Development and Technology HIGH 2h Global general Artificial Intelligence and Software Development LOW 3h Global general Artificial Intelligence and Cybersecurity MEDIUM 3h Global malware Software Development / Technology HIGH 3h Global vulnerability Information Technology HIGH 4h Global data_breach Water Utilities / Critical Infrastructure HIGH 4h Global general Cybersecurity Services HIGH 5h Global data_breach Pharmaceutical HIGH 5h Global vulnerability Technology, Artificial Intelligence CRITICAL 6h Global general Consumer Electronics and Retail MEDIUM 1h Global supply_chain Software Development and Technology HIGH 2h Global general Artificial Intelligence and Software Development LOW 3h Global general Artificial Intelligence and Cybersecurity MEDIUM 3h Global malware Software Development / Technology HIGH 3h Global vulnerability Information Technology HIGH 4h Global data_breach Water Utilities / Critical Infrastructure HIGH 4h Global general Cybersecurity Services HIGH 5h Global data_breach Pharmaceutical HIGH 5h Global vulnerability Technology, Artificial Intelligence CRITICAL 6h
Vulnerabilities

CVE-2026-40110

High
CWE-777 — Weakness Type
Published: May 5, 2026  ·  Modified: May 12, 2026  ·  Source: NVD
CVSS v3
7.3
🔗 NVD Official
📄 Description (English)

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match() to check incoming origins against the allow_origin_pat configuration value. Because re.match() only anchors at the start of the string and does not require a full match, a pattern intended to match only a trusted domain (e.g., trusted.example.com) will also match any origin that begins with that domain followed by additional characters (e.g., trusted.example.com.evil.com). An attacker who controls such a domain can bypass the CORS origin restriction and make cross-origin requests to the Jupyter Server API from an untrusted site. This issue has been fixed in version 2.18.0.

🤖 AI Executive Summary

Jupyter Server versions 2.17.0 and earlier contain a CORS origin validation bypass due to improper use of regex matching that allows attackers to bypass origin restrictions. An attacker controlling a domain matching the trusted pattern can make unauthorized cross-origin requests to the Jupyter Server API.

📄 Description (Arabic)

يستخدم خادم Jupyter دالة re.match() التي تتحقق فقط من بداية السلسلة دون ضمان المطابقة الكاملة، مما يسمح بتجاوز قيود الأصل. يمكن لمهاجم يتحكم في نطاق فرعي مثل trusted.example.com.evil.com تجاوز التحقق والوصول إلى واجهة برمجة التطبيقات.

🤖 ملخص تنفيذي (AI)

خادم Jupyter الإصدارات 2.17.0 وأقدم يحتوي على ثغرة تجاوز التحقق من أصل CORS بسبب استخدام غير صحيح لمطابقة التعبيرات العادية. يمكن للمهاجم التحكم في نطاق مطابق للنمط الموثوق به تقديم طلبات عبر الأصول غير المصرح بها.

🤖 AI Intelligence Analysis Analyzed: May 11, 2026 16:25
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
government healthcare energy
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade Jupyter Server to version 2.18.0 or later immediately. Review and update allow_origin_pat configuration to use anchored regex patterns with full string matching (use $ anchor at end). Implement additional CORS validation checks and monitor for suspicious cross-origin requests.
🔧 خطوات المعالجة (العربية)
قم بترقية خادم Jupyter إلى الإصدار 2.18.0 أو أحدث فوراً. راجع وحدّث تكوين allow_origin_pat لاستخدام أنماط regex مثبتة مع مطابقة السلسلة الكاملة. قم بتنفيذ فحوصات التحقق من CORS الإضافية ومراقبة الطلبات المريبة عبر الأصول.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
6.1 6.2
🔵 SAMA CSF
AC-3 AC-4 SC-7
🟡 ISO 27001:2022
A.13.1.1 A.13.1.3
📦 Affected Products / CPE 1 entries
jupyter:jupyter_server
📊 CVSS Score
7.3
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityN — None / Network
📋 Quick Facts
Severity High
CVSS Score7.3
CWECWE-777
EPSS0.06%
Exploit No
Patch ✓ Yes
Published 2026-05-05
Source Feed nvd
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
patch-available CWE-777
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