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Global apt Government and Defense CRITICAL 26m Global general Technology / Consumer Protection MEDIUM 37m Global vulnerability Information Technology and Security CRITICAL 45m Global vulnerability Information Technology CRITICAL 1h Global apt Infrastructure, Transportation, Finance/Investment HIGH 1h Global vulnerability Information Technology and Infrastructure HIGH 2h Global data_breach Education HIGH 3h Global data_breach Education HIGH 4h Global vulnerability Information Technology CRITICAL 4h Global supply_chain Software Development and Technology HIGH 5h Global apt Government and Defense CRITICAL 26m Global general Technology / Consumer Protection MEDIUM 37m Global vulnerability Information Technology and Security CRITICAL 45m Global vulnerability Information Technology CRITICAL 1h Global apt Infrastructure, Transportation, Finance/Investment HIGH 1h Global vulnerability Information Technology and Infrastructure HIGH 2h Global data_breach Education HIGH 3h Global data_breach Education HIGH 4h Global vulnerability Information Technology CRITICAL 4h Global supply_chain Software Development and Technology HIGH 5h Global apt Government and Defense CRITICAL 26m Global general Technology / Consumer Protection MEDIUM 37m Global vulnerability Information Technology and Security CRITICAL 45m Global vulnerability Information Technology CRITICAL 1h Global apt Infrastructure, Transportation, Finance/Investment HIGH 1h Global vulnerability Information Technology and Infrastructure HIGH 2h Global data_breach Education HIGH 3h Global data_breach Education HIGH 4h Global vulnerability Information Technology CRITICAL 4h Global supply_chain Software Development and Technology HIGH 5h
Vulnerabilities

CVE-2026-9349

Medium
CWE-200 — Weakness Type
Published: May 24, 2026  ·  Modified: May 27, 2026  ·  Source: NVD
CVSS v3
5.3
🔗 NVD Official
📄 Description (English)

A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

🤖 AI Executive Summary

Cal.com versions up to 4.9.4 contain an information disclosure vulnerability in the booking view component where the cancelledBy/rescheduledBy parameters expose sensitive data. Remote attackers can exploit this publicly disclosed vulnerability without authentication to retrieve confidential booking information.

📄 Description (Arabic)

تم اكتشاف ثغرة كشف معلومات في Cal.com حتى الإصدار 4.9.4 في دالة getServerSideProps حيث يمكن للمهاجمين التلاعب بمعاملات cancelledBy و rescheduledBy للوصول إلى بيانات حساسة. تم الكشف عن هذه الثغرة علناً ويمكن استغلالها عن بعد دون الحاجة إلى مصادقة.

🤖 ملخص تنفيذي (AI)

Cal.com versions up to 4.9.4 contain an information disclosure vulnerability in the booking view component where the cancelledBy/rescheduledBy parameters expose sensitive data. Remote attackers can exploit this publicly disclosed vulnerability without authentication to retrieve confidential booking information.

🤖 AI Intelligence Analysis Analyzed: May 29, 2026 06:41
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
telecom healthcare government
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
5.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade Cal.com to version 4.9.5 or later immediately. Implement input validation and sanitization for cancelledBy and rescheduledBy parameters. Apply Web Application Firewall rules to restrict access to sensitive booking endpoints. Monitor access logs for suspicious parameter manipulation attempts.
🔧 خطوات المعالجة (العربية)
قم بترقية Cal.com إلى الإصدار 4.9.5 أو أحدث فوراً. طبق التحقق من صحة المدخلات والتنظيف للمعاملات cancelledBy و rescheduledBy. طبق قواعد جدار الحماية لتقييد الوصول إلى نقاط نهاية الحجوزات الحساسة. راقب سجلات الوصول للكشف عن محاولات معالجة معاملات مريبة.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.7.1.1 A.7.2.1 A.8.2.1
🔵 SAMA CSF
ID.RA-1 PR.AC-1 PR.DS-1
🟡 ISO 27001:2022
A.5.1.1 A.6.1.1 A.13.1.1
📊 CVSS Score
5.3
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityL — Low / Local
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score5.3
CWECWE-200
EPSS0.03%
Exploit No
Patch ✗ No
Published 2026-05-24
Source Feed nvd
🇸🇦 Saudi Risk Score
5.0
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
CWE-200
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