CVE-2026-76104 Overview
CVE-2026-76104 is an Incorrect Permission Assignment for Critical Resource vulnerability [CWE-732] affecting Dell ObjectScale versions prior to 4.4.0.0. The flaw resides in the underlying operating system layer of the ObjectScale software-defined object storage platform. A remote attacker holding high privileges can exploit the improper permissions to trigger a denial of service condition against the affected system.
Critical Impact
Successful exploitation allows an authenticated, high-privileged remote attacker to cause denial of service, disrupting object storage availability for dependent applications and workloads.
Affected Products
- Dell ObjectScale versions prior to 4.4.0.0
Discovery Timeline
- 2026-09-16 - CVE-2026-76104 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-76104
Vulnerability Analysis
Dell ObjectScale is a containerized, S3-compatible object storage platform for Kubernetes environments. The vulnerability originates in the operating system layer that hosts ObjectScale services. Certain critical resources are assigned permissions that are broader than required, violating the principle of least privilege.
An attacker with high privileges and remote access to the platform can leverage these overly permissive settings to modify or interfere with critical resources. The resulting behavior degrades or halts platform functionality, producing a denial of service. Confidentiality is not affected, and integrity impact is limited, but availability of the storage service can be fully disrupted.
Root Cause
The root cause is an Incorrect Permission Assignment for Critical Resource weakness [CWE-732] in the OS component packaged with Dell ObjectScale. Resources that should be restricted to a narrow set of trusted principals are exposed to accounts holding elevated privileges within the platform. This misconfiguration permits actions that were not intended for those roles.
Attack Vector
Exploitation requires network access to the ObjectScale management or service surface and an account with high privileges. No user interaction is required. Once authenticated, the attacker interacts with the affected critical resource through supported administrative channels to trigger the availability impact. Refer to the Dell Security Update DSA-2026-393 for vendor-supplied technical detail.
Detection Methods for CVE-2026-76104
Indicators of Compromise
- Unexpected restarts, crashes, or unavailability of ObjectScale services or S3 endpoints.
- Administrative API calls or configuration changes from high-privileged accounts that precede service degradation.
- Modifications to system files, service accounts, or object storage configuration outside of scheduled change windows.
Detection Strategies
- Audit privileged account activity on ObjectScale nodes and the underlying OS for atypical resource access patterns.
- Correlate service availability alerts with authenticated administrative sessions to identify abuse of legitimate credentials.
- Baseline file and permission state on ObjectScale hosts and alert on deviations affecting critical system resources.
Monitoring Recommendations
- Forward ObjectScale audit logs, Kubernetes control-plane events, and host OS logs to a centralized analytics platform for correlation.
- Alert on repeated failed or successful privileged operations against storage configuration and OS-level resources.
- Track service health metrics for the ObjectScale data path and management plane to detect availability regressions early.
How to Mitigate CVE-2026-76104
Immediate Actions Required
- Upgrade Dell ObjectScale to version 4.4.0.0 or later as directed in Dell advisory DSA-2026-393.
- Inventory all ObjectScale deployments and identify instances running versions prior to 4.4.0.0.
- Review and restrict membership of high-privileged roles that can reach the ObjectScale management interfaces.
Patch Information
Dell has addressed CVE-2026-76104 in Dell ObjectScale 4.4.0.0. Administrators should review the Dell Security Update DSA-2026-393 for upgrade instructions and any prerequisites that apply to their deployment topology.
Workarounds
- Limit network exposure of ObjectScale management endpoints to trusted administrative networks only.
- Enforce multi-factor authentication and strict role assignment for accounts that hold high privileges on the platform.
- Monitor privileged sessions and implement just-in-time access for administrative operations until patching is complete.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.