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Vulnerabilities

CVE-2026-3071

High
Deserialization of untrusted data in the LanguageModel class of Flair from versions 0.4.1 to latest are vulnerable to arbitrary code execution when loading a malicious model.
CWE-502 — Weakness Type
Published: Feb 26, 2026  ·  Modified: Mar 5, 2026  ·  Source: NVD
CVSS v3
8.4
🔗 NVD Official
📄 Description (English)

Deserialization of untrusted data in the LanguageModel class of Flair from versions 0.4.1 to latest are vulnerable to arbitrary code execution when loading a malicious model.

🤖 AI Executive Summary

CVE-2026-3071 is a critical deserialization vulnerability in Flair (NLP library) versions 0.4.1 and later that allows arbitrary code execution through malicious model files. The vulnerability affects organizations using Flair for natural language processing tasks, particularly those handling untrusted model sources. With a CVSS score of 8.4 and no current public exploits, immediate patching is essential to prevent potential compromise of systems processing NLP workloads.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 24, 2026 16:32
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations in AI/ML research, government digital transformation initiatives, and financial institutions implementing NLP for fraud detection and customer service automation. High-risk sectors include: SAMA-regulated banks using Flair for transaction analysis, government agencies (NCA, CITC) deploying NLP for cybersecurity monitoring, healthcare providers using text analysis for medical records, and telecommunications companies (STC, Mobily) processing customer communications. Organizations with development environments or data science teams are at elevated risk if they download models from untrusted repositories or allow model updates without validation.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Research and Academia E-commerce and Retail
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running Flair versions 0.4.1 through latest using software inventory tools
2. Restrict model loading to trusted, internally-validated sources only
3. Implement network segmentation to isolate NLP processing systems
4. Disable automatic model downloads and require manual approval

PATCHING GUIDANCE:
1. Update Flair to the patched version immediately (monitor official GitHub releases)
2. Validate all existing models against known-good checksums before loading
3. Implement code signing verification for model files
4. Test patches in isolated environments before production deployment

COMPENSATING CONTROLS (if patch unavailable):
1. Run Flair in containerized/sandboxed environments with minimal privileges
2. Implement strict input validation on model file sources
3. Use file integrity monitoring (FIM) on model directories
4. Monitor process execution for suspicious child processes from Python/Flair processes

DETECTION RULES:
1. Alert on pickle/serialized object deserialization from untrusted sources
2. Monitor for unexpected child process spawning from Python interpreters
3. Track model file modifications and unauthorized downloads
4. Log all model loading operations with source verification
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل إصدارات Flair من 0.4.1 وحتى الأحدث باستخدام أدوات جرد البرامج
2. تقييد تحميل النموذج إلى مصادر موثوقة ومتحقق منها داخلياً فقط
3. تنفيذ تقسيم الشبكة لعزل أنظمة معالجة اللغة الطبيعية
4. تعطيل تنزيلات النموذج التلقائية وتطلب الموافقة اليدوية

إرشادات التصحيح:
1. تحديث Flair إلى الإصدار المصحح فوراً (مراقبة إصدارات GitHub الرسمية)
2. التحقق من صحة جميع النماذج الموجودة مقابل قيم التجزئة المعروفة قبل التحميل
3. تنفيذ التحقق من التوقيع الرقمي لملفات النموذج
4. اختبار التصحيحات في بيئات معزولة قبل نشرها في الإنتاج

الضوابط البديلة (إذا لم يكن التصحيح متاحاً):
1. تشغيل Flair في بيئات محتوية/معزولة برمجياً بامتيازات محدودة
2. تنفيذ التحقق الصارم من المدخلات على مصادر ملفات النموذج
3. استخدام مراقبة سلامة الملفات (FIM) على دلائل النموذج
4. مراقبة تنفيذ العملية للعمليات الفرعية المريبة من عمليات Python/Flair

قواعد الكشف:
1. تنبيه عند فك تسلسل كائنات pickle/المسلسلة من مصادر غير موثوقة
2. مراقبة توليد العمليات الفرعية غير المتوقعة من مترجمات Python
3. تتبع تعديلات ملفات النموذج والتنزيلات غير المصرح بها
4. تسجيل جميع عمليات تحميل النموذج مع التحقق من المصدر
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.14.2.1 - Change management procedures for software updates ECC 2024 A.12.6.1 - Management of technical vulnerabilities ECC 2024 A.12.2.1 - Establishment of user access rights ECC 2024 A.13.1.3 - Segregation of networks
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.IP-12 - Software development security practices DE.CM-8 - Vulnerability scans and assessments RS.MI-2 - Incident containment and recovery
🟡 ISO 27001:2022
A.12.2.1 - Monitoring of system use A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Change management A.13.1.3 - Segregation of networks
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates Requirement 6.5.1 - Injection flaws prevention Requirement 11.2 - Vulnerability scanning
📊 CVSS Score
8.4
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.4
CWECWE-502
EPSS0.07%
Exploit No
Patch ✓ Yes
Published 2026-02-26
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-502
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