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Vulnerabilities

CVE-2026-23989

High
REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the "Reva" component of OpenCloud allows a malicious user to bypass the scope verificati
CWE-863 — Weakness Type
Published: Feb 6, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
8.2
🔗 NVD Official
📄 Description (English)

REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the "Reva" component of OpenCloud allows a malicious user to bypass the scope verification of a public link. By exploiting this via the the "archiver" service this can be leveraged to create an archive (zip or tar-file) containing all resources that this creator of the public link has access to. This vulnerability is fixed in 2.42.3 and 2.40.3.

🤖 AI Executive Summary

CVE-2026-23989 is a critical authorization bypass vulnerability in REVA's GRPC middleware that allows attackers to circumvent public link scope verification. Exploiting this flaw through the archiver service enables unauthorized access to all resources accessible to the public link creator, potentially exposing sensitive organizational data. This vulnerability affects REVA versions prior to 2.42.3 and 2.40.3, with patches now available.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 25, 2026 15:21
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using OpenCloud REVA for document management and collaboration—particularly in government agencies (NCA, CITC), banking sector (SAMA-regulated institutions), healthcare providers, and energy companies—face significant risk of unauthorized data exfiltration. The vulnerability enables attackers to archive and extract all files accessible to public link creators, potentially compromising classified government documents, financial records, patient data, and proprietary energy sector information. Organizations relying on REVA for secure file sharing and collaboration are at highest risk.
🏢 Affected Saudi Sectors
Government Banking Healthcare Energy Telecommunications Education Legal Services
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all REVA deployments running versions prior to 2.42.3 or 2.40.3
2. Restrict access to the archiver service immediately until patching is complete
3. Review audit logs for suspicious archiver service activity and public link access patterns
4. Disable public link functionality if not critical to operations

PATCHING:
1. Upgrade REVA to version 2.42.3 or 2.40.3 immediately
2. Test patches in non-production environments first
3. Implement staged rollout to minimize service disruption

COMPENSATING CONTROLS (if immediate patching not possible):
1. Implement network-level restrictions on archiver service access
2. Enable detailed logging and monitoring of all archiver operations
3. Implement IP whitelisting for archiver service access
4. Disable public link creation until patching is complete

DETECTION:
1. Monitor for unusual archiver service requests with public link tokens
2. Alert on large archive creation operations from public link contexts
3. Track failed authorization attempts in GRPC middleware logs
4. Monitor for bulk resource access patterns via public links
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نشرات REVA التي تعمل بإصدارات سابقة للإصدار 2.42.3 أو 2.40.3
2. تقييد الوصول إلى خدمة الأرشيف فوراً حتى اكتمال التصحيح
3. مراجعة سجلات التدقيق للنشاط المريب في خدمة الأرشيف وأنماط الوصول إلى الروابط العامة
4. تعطيل وظيفة الرابط العام إذا لم تكن حرجة للعمليات

التصحيح:
1. ترقية REVA إلى الإصدار 2.42.3 أو 2.40.3 فوراً
2. اختبار التصحيحات في بيئات غير الإنتاج أولاً
3. تنفيذ طرح مرحلي لتقليل انقطاع الخدمة

الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. تنفيذ قيود على مستوى الشبكة على الوصول إلى خدمة الأرشيف
2. تفعيل التسجيل والمراقبة التفصيلية لجميع عمليات الأرشيف
3. تنفيذ القائمة البيضاء للعناوين IP لوصول خدمة الأرشيف
4. تعطيل إنشاء الرابط العام حتى اكتمال التصحيح

الكشف:
1. مراقبة طلبات خدمة الأرشيف غير العادية مع رموز الروابط العامة
2. التنبيه على عمليات إنشاء الأرشيف الكبيرة من سياقات الروابط العامة
3. تتبع محاولات التفويض الفاشلة في سجلات برنامج وسيط GRPC
4. مراقبة أنماط الوصول إلى الموارد الضخمة عبر الروابط العامة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policy ECC 2024 A.6.1.2 - User Access Management ECC 2024 A.8.2.1 - User Identification and Authentication ECC 2024 A.8.2.3 - Password Management ECC 2024 A.9.1.1 - Event Logging
🔵 SAMA CSF
SAMA CSF ID.AC-1 - Access Control Policy and Procedures SAMA CSF ID.AC-3 - Access Enforcement SAMA CSF DE.AE-1 - Audit and Accountability SAMA CSF DE.AE-3 - Detect Unauthorized Access
🟡 ISO 27001:2022
ISO 27001:2022 A.5.3 - Segregation of Duties ISO 27001:2022 A.8.2 - User Access Management ISO 27001:2022 A.8.3 - User Responsibilities ISO 27001:2022 A.8.4 - Access Rights Review ISO 27001:2022 A.8.5 - Access Rights Removal
🟣 PCI DSS v4.0.1
PCI DSS 2.1 - Configuration Standards PCI DSS 6.5.10 - Broken Authentication PCI DSS 7.1 - Limit Access to System Components PCI DSS 10.2 - Implement Automated Audit Trails
📦 Affected Products / CPE 2 entries
heinlein:opencloud_reva
heinlein:opencloud_reva
📊 CVSS Score
8.2
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityL — Low / Local
AvailabilityN — None / Network
📋 Quick Facts
Severity High
CVSS Score8.2
CWECWE-863
EPSS0.03%
Exploit No
Patch ✓ Yes
Published 2026-02-06
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
patch-available CWE-863
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