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Vulnerabilities

CVE-2026-33217

High
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using ACLs on message subjects, these ACLs were not applied i
CWE-863 — Weakness Type
Published: Mar 25, 2026  ·  Modified: Mar 28, 2026  ·  Source: NVD
CVSS v3
7.1
🔗 NVD Official
📄 Description (English)

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using ACLs on message subjects, these ACLs were not applied in the `$MQTT.>` namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.

🤖 AI Executive Summary

NATS-Server versions prior to 2.11.15 and 2.12.6 fail to enforce ACLs in the $MQTT.> namespace, allowing MQTT clients to bypass access controls on message subjects. This vulnerability affects organizations using NATS messaging systems with MQTT protocol and ACL-based security policies.

📄 Description (Arabic)

يحتوي NATS-Server على ثغرة في التحكم بالوصول حيث لا يتم تطبيق قوائم التحكم بالوصول (ACLs) على موضوعات الرسائل في مساحة الاسم $MQTT.>. يسمح هذا لعملاء MQTT بتجاوز فحوصات التحكم بالوصول والوصول إلى الموضوعات المحظورة. تم إصلاح هذه المشكلة في الإصدارات 2.11.15 و 2.12.6 وما بعده.

🤖 ملخص تنفيذي (AI)

خوادم NATS الإصدارات السابقة لـ 2.11.15 و 2.12.6 تفشل في فرض قوائم التحكم بالوصول في مساحة الاسم $MQTT.>، مما يسمح لعملاء MQTT بتجاوز فحوصات التحكم بالوصول. يؤثر هذا الضعف على المنظمات التي تستخدم أنظمة رسائل NATS مع بروتوكول MQTT وسياسات أمان قائمة على التحكم بالوصول.

🤖 AI Intelligence Analysis Analyzed: May 9, 2026 22:17
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
telecom energy government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade NATS-Server to version 2.11.15 or 2.12.6 or later immediately. Verify ACL configurations are properly applied across all namespaces including $MQTT.> after patching. Implement network segmentation to restrict MQTT client access until patching is complete.
🔧 خطوات المعالجة (العربية)
قم بترقية NATS-Server إلى الإصدار 2.11.15 أو 2.12.6 أو أحدث على الفور. تحقق من أن تكوينات قوائم التحكم بالوصول يتم تطبيقها بشكل صحيح عبر جميع مساحات الأسماء بما في ذلك $MQTT.> بعد التصحيح. قم بتنفيذ تقسيم الشبكة لتقييد وصول عملاء MQTT حتى يتم إكمال التصحيح.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1.1 5.1.2 5.2.1
🔵 SAMA CSF
AC-2 AC-3 AC-6
🟡 ISO 27001:2022
A.9.1.1 A.9.2.1 A.9.4.1
📦 Affected Products / CPE 2 entries
linuxfoundation:nats-server
linuxfoundation:nats-server
📊 CVSS Score
7.1
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityL — Low / Local
IntegrityH — High
AvailabilityN — None / Network
📋 Quick Facts
Severity High
CVSS Score7.1
CWECWE-863
Exploit No
Patch ✗ No
Published 2026-03-25
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-863
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