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Global phishing Cross-sector HIGH 4h Global vulnerability Enterprise Software / ERP Systems CRITICAL 25m Global vulnerability IT Infrastructure CRITICAL 1h Global vulnerability Technology and Software Development HIGH 2h Global vulnerability Enterprise IT and Government CRITICAL 2h Global ransomware Multiple Sectors / Enterprise CRITICAL 3h Global general Technology and Legal MEDIUM 3h Global ransomware Financial Services / Cryptocurrency CRITICAL 4h Global general Industrial Control Systems / Operational Technology HIGH 5h Global apt Managed Service Providers (MSPs) / IT Services HIGH 6h Global phishing Cross-sector HIGH 4h Global vulnerability Enterprise Software / ERP Systems CRITICAL 25m Global vulnerability IT Infrastructure CRITICAL 1h Global vulnerability Technology and Software Development HIGH 2h Global vulnerability Enterprise IT and Government CRITICAL 2h Global ransomware Multiple Sectors / Enterprise CRITICAL 3h Global general Technology and Legal MEDIUM 3h Global ransomware Financial Services / Cryptocurrency CRITICAL 4h Global general Industrial Control Systems / Operational Technology HIGH 5h Global apt Managed Service Providers (MSPs) / IT Services HIGH 6h Global phishing Cross-sector HIGH 4h Global vulnerability Enterprise Software / ERP Systems CRITICAL 25m Global vulnerability IT Infrastructure CRITICAL 1h Global vulnerability Technology and Software Development HIGH 2h Global vulnerability Enterprise IT and Government CRITICAL 2h Global ransomware Multiple Sectors / Enterprise CRITICAL 3h Global general Technology and Legal MEDIUM 3h Global ransomware Financial Services / Cryptocurrency CRITICAL 4h Global general Industrial Control Systems / Operational Technology HIGH 5h Global apt Managed Service Providers (MSPs) / IT Services HIGH 6h
Vulnerabilities

CVE-2026-6276

High ⚡ Exploit Available
CWE-319 — Weakness Type
Published: May 13, 2026  ·  Modified: May 20, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

Using libcurl, when a custom `Host:` header is first set for an HTTP request
and a second request is subsequently done using the same *easy handle* but
without the custom `Host:` header set, the second request would use stale
information and pass on cookies meant for the first host in the second
request. Leak them.

🤖 AI Executive Summary

CVE-2026-6276 is a cookie leakage vulnerability in libcurl where reusing an easy handle without resetting a custom Host header causes cookies from the first request to be sent to the second host. This affects applications that make multiple HTTP requests with the same connection handle, potentially exposing sensitive session data.

📄 Description (Arabic)

يحدث هذا الضعف عندما يتم إعادة استخدام مقبض libcurl الذي تم تعيين رأس Host مخصص له دون إعادة تعيينه للطلب الثاني، مما يؤدي إلى تمرير ملفات تعريف الارتباط المخصصة للمضيف الأول إلى المضيف الثاني. يؤثر هذا على التطبيقات التي تقوم بطلبات HTTP متعددة باستخدام نفس كائن الاتصال.

🤖 ملخص تنفيذي (AI)

A cookie leakage vulnerability in libcurl allows sensitive cookies from one host to be leaked to another host when reusing connection handles without properly resetting custom Host headers. This impacts applications making sequential HTTP requests with shared connection objects.

🤖 AI Intelligence Analysis Analyzed: May 20, 2026 09:14
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking telecom government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Update libcurl to the latest patched version immediately. Review and audit all applications using libcurl for proper connection handle management. Implement separate easy handles for requests to different hosts or explicitly reset Host headers between requests. Enable HTTP cookie security policies and implement additional session validation mechanisms.
🔧 خطوات المعالجة (العربية)
قم بتحديث libcurl إلى أحدث إصدار معدل فوراً. راجع جميع التطبيقات التي تستخدم libcurl للتأكد من إدارة صحيحة لمقابض الاتصال. استخدم مقابض منفصلة للطلبات إلى مضيفين مختلفين أو أعد تعيين رؤوس Host بشكل صريح. طبق سياسات أمان ملفات تعريف الارتباط وآليات التحقق من الجلسة الإضافية.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1 5.2 6.1
🔵 SAMA CSF
AC-3 AC-4 SI-7
🟡 ISO 27001:2022
A.6.1.1 A.13.1.1 A.13.1.3
📦 Affected Products / CPE 1 entries
haxx:curl
📊 CVSS Score
7.5
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.5
CWECWE-319
EPSS0.02%
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-05-13
Source Feed nvd
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
exploit-available patch-available CWE-319
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