PT-2026-60315 · Sandboxie Plus · Sandboxie

Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-45313

NVD

CVSS v3.1

7.7

High

Base vector

AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandboxie-Plus is an open source sandbox-based isolation software for Windows. Prior to 1.17.6, GuiServer::WndHookRegisterSlave in Sandboxie/core/svc/GuiServer.cpp stores attacker-supplied hthread and hproc fields from a GUI WND HOOK REGISTER request without validating that the thread belongs to the sandboxed process or that the function pointer is in the caller address space, and GuiServer::WndHookNotifySlave then calls OpenThread(THREAD SET CONTEXT, FALSE, whk->hthread) and QueueUserAPC((PAPCFUNC)whk->hproc, hThread, (ULONG PTR)req->threadid) as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This issue is fixed in version 1.17.6.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-45313

Affected Products

Sandboxie

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-45313 · Security Note
• https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-rmv3-fhg3-75xh · Note
• https://github.com/sandboxie-plus/Sandboxie/releases/tag/v1.17.6 · Note