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Vulnerabilities

CVE-2026-34090

High
CWE-200 — Weakness Type
Published: May 11, 2026  ·  Modified: May 18, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser.

This issue affects CheckUser: from 1.45.0 before 1.45.2.

🤖 AI Executive Summary

CVE-2026-34090 is a sensitive information exposure vulnerability in Wikimedia Foundation's CheckUser extension versions 1.45.0 through 1.45.1. Unauthorized actors can access restricted user information that should only be available to administrators.

📄 Description (Arabic)

ثغرة في ملحق CheckUser من Wikimedia تسمح بكشف المعلومات الحساسة للمستخدمين غير المصرح لهم. تؤثر الثغرة على الإصدارات من 1.45.0 إلى 1.45.1 وتسمح بالوصول إلى بيانات يجب أن تكون مقيدة للمسؤولين فقط.

🤖 ملخص تنفيذي (AI)

This vulnerability allows unauthorized access to sensitive user data in CheckUser extension versions 1.45.0 to 1.45.1. The flaw exposes information that should be restricted to administrative personnel only.

🤖 AI Intelligence Analysis Analyzed: May 15, 2026 01:15
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: medium
🏢 Affected Saudi Sectors
government telecom
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Update CheckUser extension to version 1.45.2 or later immediately. Review access logs for unauthorized information access. Verify user permissions and audit administrative accounts for suspicious activity.
🔧 خطوات المعالجة (العربية)
قم بتحديث ملحق CheckUser إلى الإصدار 1.45.2 أو أحدث فوراً. راجع سجلات الوصول للكشف عن أي وصول غير مصرح. تحقق من صلاحيات المستخدمين وراجع حسابات المسؤولين للنشاط المريب.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1 5.2 6.1
🔵 SAMA CSF
AC-2 AC-3 AU-2
🟡 ISO 27001:2022
A.9.1.1 A.9.2.1 A.9.4.3
📦 Affected Products / CPE 1 entries
mediawiki:checkuser
📊 CVSS Score
7.5
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity High
CVSS Score7.5
CWECWE-200
EPSS0.04%
Exploit No
Patch ✓ Yes
Published 2026-05-11
Source Feed nvd
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
patch-available CWE-200
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