📄 Description (English)
Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.
🤖 AI Executive Summary
Bitwarden Server versions prior to 2026.4.1 contain an authentication bypass vulnerability allowing authenticated users with SCIM management privileges to retrieve or rotate organization API keys without re-authenticating with their master password. This high-severity flaw (CVSS 8.1) enables credential theft and unauthorized access to identity management systems. Organizations using Bitwarden for centralized credential management face significant risk of lateral movement and privilege escalation attacks.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 14, 2026 08:50
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations relying on Bitwarden for centralized credential management—particularly in banking (SAMA-regulated institutions), government agencies (NCA oversight), healthcare providers, and large enterprises—face significant risk. The vulnerability directly impacts identity and access management (IAM) security posture. Compromised SCIM API keys could enable attackers to manipulate user provisioning/deprovisioning, create backdoor accounts, or access integrated systems (Microsoft Entra ID, Okta, etc.). Financial institutions and government entities managing sensitive authentication infrastructure are at highest risk of exploitation.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Large Enterprises with IAM infrastructure
Cloud Service Providers
🎯 MITRE ATT&CK Techniques
T1110 - Brute Force (credential access without re-authentication)
T1187 - Forced Authentication (bypassing master password requirement)
T1556 - Modify Authentication Process (SCIM API key management)
T1098 - Account Manipulation (unauthorized API key access)
T1078 - Valid Accounts (leveraging existing session tokens)
T1199 - Trusted Relationship (SCIM integration abuse)
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all Bitwarden Server instances and verify current version (check if prior to 2026.4.1)
2. Audit SCIM API key access logs for unauthorized retrieval or rotation attempts
3. Review user accounts with SCIM management privileges and validate legitimacy
4. Implement session monitoring for SCIM-related API calls
Patching Guidance:
1. Upgrade Bitwarden Server to version 2026.4.1 or later immediately
2. After patching, rotate all SCIM API keys as a precautionary measure
3. Force re-authentication for all active sessions post-upgrade
Compensating Controls (if patching delayed):
1. Restrict SCIM management privileges to minimal required users
2. Implement IP whitelisting for SCIM API key management endpoints
3. Enable multi-factor authentication (MFA) for all privileged accounts
4. Deploy network segmentation isolating Bitwarden infrastructure
5. Implement real-time alerting on SCIM API key access/rotation events
Detection Rules:
1. Monitor for SCIM API key retrieval without preceding master password re-authentication
2. Alert on SCIM API key rotation by non-standard accounts or outside business hours
3. Track failed master password re-authentication attempts followed by successful API key access
4. Monitor for bulk user provisioning/deprovisioning via SCIM post-compromise
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع مثيلات خادم Bitwarden والتحقق من الإصدار الحالي (تحقق مما إذا كان سابقاً للإصدار 2026.4.1)
2. تدقيق سجلات وصول مفتاح SCIM API للمحاولات غير المصرح بها للاسترجاع أو التدوير
3. مراجعة حسابات المستخدمين التي تتمتع بامتيازات إدارة SCIM والتحقق من الشرعية
4. تنفيذ مراقبة الجلسات لاستدعاءات API المتعلقة بـ SCIM
إرشادات التصحيح:
1. ترقية خادم Bitwarden إلى الإصدار 2026.4.1 أو أحدث فوراً
2. بعد التصحيح، قم بتدوير جميع مفاتيح SCIM API كإجراء احترازي
3. فرض إعادة المصادقة لجميع الجلسات النشطة بعد الترقية
الضوابط البديلة (إذا تأخر التصحيح):
1. تقييد امتيازات إدارة SCIM للمستخدمين المطلوبين بالحد الأدنى
2. تنفيذ القائمة البيضاء للعناوين IP لنقاط نهاية إدارة مفتاح SCIM API
3. تفعيل المصادقة متعددة العوامل (MFA) لجميع الحسابات ذات الامتيازات
4. نشر تقسيم الشبكة لعزل بنية Bitwarden
5. تنفيذ التنبيهات في الوقت الفعلي لأحداث وصول/تدوير مفتاح SCIM API
قواعد الكشف:
1. مراقبة استرجاع مفتاح SCIM API دون إعادة مصادقة رمز المرور الرئيسي السابقة
2. التنبيه على تدوير مفتاح SCIM API بواسطة حسابات غير قياسية أو خارج ساعات العمل
3. تتبع محاولات إعادة مصادقة رمز المرور الرئيسي الفاشلة متبوعة بوصول ناجح إلى مفتاح API
4. مراقبة توفير/إلغاء توفير المستخدمين بكميات كبيرة عبر SCIM بعد الاختراق
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - User access control and authentication
ECC 2024 A.5.2.1 - User registration and access rights management
ECC 2024 A.5.3.1 - Password management requirements
ECC 2024 A.8.2.3 - Logging and monitoring of access to critical systems
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Asset management and inventory
SAMA CSF PR.AC-1 - Access control policy and procedures
SAMA CSF PR.AC-2 - Physical and logical access controls
SAMA CSF DE.AE-1 - Anomalies and events are detected and analyzed
🟡 ISO 27001:2022
ISO 27001:2022 A.5.2 - User access management
ISO 27001:2022 A.5.3 - Access control
ISO 27001:2022 A.8.2 - Privileged access rights
ISO 27001:2022 A.8.3 - Information access restriction
🟣 PCI DSS v4.0.1
PCI DSS 2.1 - Change default passwords
PCI DSS 7.1 - Limit access to system components by business need
PCI DSS 8.1 - Assign unique ID to each person with access
PCI DSS 8.2 - Ensure proper user authentication
🔗 References & Sources 5
🔗
https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083
disclosure@vulncheck.com
Patch
🔗
https://github.com/bitwarden/server/pull/7403
disclosure@vulncheck.com
Issue Tracking
Patch
🔗
https://github.com/bitwarden/server/releases/tag/v2026.4.1
disclosure@vulncheck.com
Release Notes
🔗
https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass
disclosure@vulncheck.com
Exploit
Third Party Advisory
🔗
https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-ap...
disclosure@vulncheck.com
Third Party Advisory
📦 Affected Products / CPE 1 entries
bitwarden:server