CVE-2026-46874 Overview
CVE-2026-46874 affects the Core component of Oracle VM VirtualBox version 7.2.8. The vulnerability allows a high-privileged attacker with local logon access to the infrastructure running VirtualBox to obtain unauthorized read access to a subset of VirtualBox-accessible data. Oracle classifies this as an information disclosure flaw mapped to [CWE-200]. While the vulnerability resides in VirtualBox, successful exploitation produces a scope change that may impact additional products on the host. The flaw is locally exploitable, requires no user interaction, and only affects confidentiality.
Critical Impact
A local high-privileged attacker can read a subset of VirtualBox data, with a scope change that may extend the impact to additional products on the host system.
Affected Products
- Oracle VM VirtualBox 7.2.8
- Oracle Virtualization (Core component)
- Host systems running the affected VirtualBox build
Discovery Timeline
- 2026-06-17 - CVE-2026-46874 published to NVD
- 2026-06-18 - Last updated in NVD database
- 2026-06-18 - Oracle Critical Patch Update advisory references this issue
Technical Details for CVE-2026-46874
Vulnerability Analysis
The vulnerability resides in the Core component of Oracle VM VirtualBox 7.2.8. It is classified under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor). An attacker authenticated to the host with high privileges can leverage the flaw to read data that the VirtualBox process can access. The advisory notes a scope change, meaning the impact extends beyond the vulnerable component to additional products on the host. Confidentiality is partially impacted, while integrity and availability are not affected.
Because exploitation requires local logon and high privileges, the threat profile is limited to scenarios where an attacker has already obtained administrative or operator access to the virtualization host. The information disclosed can support further reconnaissance or assist in lateral movement against guest workloads.
Root Cause
The root cause is improper restriction of access to internal data structures or runtime state within the VirtualBox Core. Oracle has not published low-level technical details. The [CWE-200] classification indicates that data intended to remain internal to the hypervisor or guest context becomes reachable by an authenticated host operator through a supported VirtualBox interface.
Attack Vector
The attack vector is local. The attacker must hold high privileges on the infrastructure where VirtualBox executes and must already have logon access. No user interaction is required. Exploitation produces a scope change, which signals that disclosed data crosses the trust boundary between the hypervisor and adjacent products or guests on the same host.
No public exploit is available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog. The current EPSS probability is 0.147%, reflecting low expected exploitation activity in the near term.
Detection Methods for CVE-2026-46874
Indicators of Compromise
- Unexpected access to VirtualBox runtime files, shared memory regions, or IPC endpoints by host accounts that do not normally administer virtualization workloads.
- Use of VBoxManage or related VirtualBox utilities by privileged accounts outside documented operational change windows.
- Reads of VirtualBox configuration directories (.VirtualBox, Machines) followed by data staging or compression activity.
Detection Strategies
- Inventory hosts running Oracle VM VirtualBox 7.2.8 and correlate against authorized administrator account activity.
- Audit local logon events on virtualization hosts and flag privileged sessions that interact with VirtualBox binaries or APIs.
- Monitor process creation chains where VBoxSVC, VBoxHeadless, or VBoxManage are invoked by accounts outside the virtualization administration group.
Monitoring Recommendations
- Enable host-level auditing for read access to VirtualBox installation paths and per-user VM directories.
- Forward VirtualBox service logs and host security logs to a centralized analytics platform for correlation.
- Alert on privilege escalation events on virtualization hosts that precede VirtualBox process interaction.
How to Mitigate CVE-2026-46874
Immediate Actions Required
- Identify all systems running Oracle VM VirtualBox 7.2.8 and prioritize them for patching.
- Apply the fix referenced in the Oracle Critical Patch Update advisory at the earliest available maintenance window.
- Restrict local logon on virtualization hosts to a minimal set of trusted administrators.
Patch Information
Oracle addresses CVE-2026-46874 through the June 2026 Critical Patch Update. Administrators should consult the Oracle Security Alert for the specific fixed build of Oracle VM VirtualBox and apply it to all affected hosts. Verify the installed version after patching using VBoxManage --version.
Workarounds
- Limit administrative and operator accounts on VirtualBox hosts to enforce least privilege until patches are applied.
- Segregate VirtualBox hosts from general-purpose workstations to reduce the population of users with local logon rights.
- Disable or remove unused VirtualBox features and extension packs that increase the host attack surface.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
