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Vulnerabilities

CVE-2026-41174

Medium ⚡ Exploit Available
CWE-653 — Weakness Type
Published: Apr 30, 2026  ·  Modified: May 3, 2026  ·  Source: NVD
CVSS v3
6.4
🔗 NVD Official
📄 Description (English)

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is a potential vulnerability in Traefik's Kubernetes CRD provider cross-namespace isolation enforcement. When providers.kubernetesCRD.allowCrossNamespace=false, Traefik correctly rejects direct cross-namespace middleware references from IngressRoute objects, but fails to apply the same restriction to middleware references nested inside a Chain middleware's spec.chain.middlewares[]. An actor with permission to create or update Traefik CRDs in their own namespace can exploit this to cause Traefik to resolve and apply middleware objects from another namespace, bypassing the documented isolation boundary. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.

🤖 AI Executive Summary

Traefik's Kubernetes CRD provider has a cross-namespace isolation bypass vulnerability where middleware references nested in Chain objects are not properly restricted when allowCrossNamespace=false. An attacker with namespace-level CRD permissions can exploit this to access middleware from other namespaces, violating documented security boundaries.

📄 Description (Arabic)

يحتوي Traefik على ثغرة في مزود Kubernetes CRD حيث لا يتم تطبيق قيود عزل مساحة الأسماء بشكل صحيح على مراجع البرامج الوسيطة المتداخلة داخل كائنات Chain عندما يكون allowCrossNamespace=false. يمكن لمستخدم لديه أذونات لإنشاء أو تحديث CRDs في مساحة الأسماء الخاصة به استغلال هذا للوصول إلى البرامج الوسيطة من مساحات أسماء أخرى.

🤖 ملخص تنفيذي (AI)

Traefik's Kubernetes CRD provider has a cross-namespace isolation bypass vulnerability where middleware references nested in Chain objects are not properly restricted when allowCrossNamespace=false. An attacker with namespace-level CRD permissions can exploit this to access middleware from other namespaces, violating documented security boundaries.

🤖 AI Intelligence Analysis Analyzed: May 16, 2026 17:06
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
telecom government banking healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
6.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade Traefik to version 2.11.43, 3.6.14, or 3.7.0-rc.2 or later. Implement strict RBAC policies limiting CRD creation/modification permissions per namespace. Monitor and audit CRD modifications in Kubernetes clusters. Review existing IngressRoute and Chain middleware configurations for cross-namespace references.
🔧 خطوات المعالجة (العربية)
قم بترقية Traefik إلى الإصدار 2.11.43 أو 3.6.14 أو 3.7.0-rc.2 أو أحدث. طبق سياسات RBAC صارمة تحد من أذونات إنشاء/تعديل CRD لكل مساحة اسم. راقب وتدقيق تعديلات CRD في مجموعات Kubernetes. راجع تكوينات IngressRoute و Chain middleware الموجودة للمراجع عبر مساحات الأسماء.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
6.1.1 6.1.2
🔵 SAMA CSF
AC-3 AC-4
🟡 ISO 27001:2022
A.9.1.1 A.9.2.1 A.9.4.1
📦 Affected Products / CPE 6 entries
traefik:traefik
traefik:traefik
traefik:traefik:3.7.0
traefik:traefik:3.7.0
traefik:traefik:3.7.0
traefik:traefik:3.7.0
📊 CVSS Score
6.4
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeC — Changed
ConfidentialityL — Low / Local
IntegrityL — Low / Local
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score6.4
CWECWE-653
EPSS0.01%
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-04-30
Source Feed nvd
🇸🇦 Saudi Risk Score
6.0
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
exploit-available patch-available CWE-653
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