CVE-2026-45313: CWE-284: Improper Access Control in sandboxie-plus Sandboxie
Sandboxie-Plus versions prior to 1.17.6 contain an improper access control vulnerability in the GuiServer component. This flaw allows a sandboxed process to supply thread and function pointers that are not validated, enabling execution of arbitrary code in an unsandboxed host process with SYSTEM privileges. The vulnerability is fixed in version 1.17.6.
AI Analysis
Technical Summary
CVE-2026-45313 is an improper access control vulnerability (CWE-284) in Sandboxie-Plus before version 1.17.6. The vulnerability arises because GuiServer::WndHookRegisterSlave accepts attacker-controlled thread and function pointers from a GUI_WND_HOOK_REGISTER request without verifying that the thread belongs to the sandboxed process or that the function pointer is in the caller's address space. Subsequently, GuiServer::WndHookNotifySlave calls OpenThread and QueueUserAPC with these unvalidated handles and pointers as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This elevates privileges and breaks the sandbox isolation. The issue is resolved in version 1.17.6.
Potential Impact
An attacker controlling a sandboxed process can execute arbitrary code in an unsandboxed host process with SYSTEM privileges, leading to full compromise of the host system's security boundaries. Confidentiality, integrity, and availability of the host system are all impacted.
Mitigation Recommendations
Upgrade Sandboxie-Plus to version 1.17.6 or later, where this vulnerability is fixed. No other official remediation or temporary workaround is documented. Patch status is not explicitly stated but the fix is included in version 1.17.6.
CVE-2026-45313: CWE-284: Improper Access Control in sandboxie-plus Sandboxie
Description
Sandboxie-Plus versions prior to 1.17.6 contain an improper access control vulnerability in the GuiServer component. This flaw allows a sandboxed process to supply thread and function pointers that are not validated, enabling execution of arbitrary code in an unsandboxed host process with SYSTEM privileges. The vulnerability is fixed in version 1.17.6.
CVSS v3.1
Score 7.7high
Affected software
pkg:github/sandboxie-plus/SandboxieRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45313 is an improper access control vulnerability (CWE-284) in Sandboxie-Plus before version 1.17.6. The vulnerability arises because GuiServer::WndHookRegisterSlave accepts attacker-controlled thread and function pointers from a GUI_WND_HOOK_REGISTER request without verifying that the thread belongs to the sandboxed process or that the function pointer is in the caller's address space. Subsequently, GuiServer::WndHookNotifySlave calls OpenThread and QueueUserAPC with these unvalidated handles and pointers as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This elevates privileges and breaks the sandbox isolation. The issue is resolved in version 1.17.6.
Potential Impact
An attacker controlling a sandboxed process can execute arbitrary code in an unsandboxed host process with SYSTEM privileges, leading to full compromise of the host system's security boundaries. Confidentiality, integrity, and availability of the host system are all impacted.
Mitigation Recommendations
Upgrade Sandboxie-Plus to version 1.17.6 or later, where this vulnerability is fixed. No other official remediation or temporary workaround is documented. Patch status is not explicitly stated but the fix is included in version 1.17.6.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-11T20:50:30.538Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a58002568715ace438b3e77
Added to database: 07/15/2026, 21:48:21 UTC
Last enriched: 07/22/2026, 23:02:43 UTC
Last updated: 08/28/2026, 22:52:11 UTC
Views: 89
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