{"id":"CVE-2026-45313","aliases":["EUVD-2026-44821","GHSA-rmv3-fhg3-75xh"],"status":"published","title":"Sandboxie-Plus: Sandboxie APC Injection Sandbox Escape","description":"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-\u003ehthread) and QueueUserAPC((PAPCFUNC)whk-\u003ehproc, hThread, (ULONG_PTR)req-\u003ethreadid) as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This issue is fixed in version 1.17.6.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00152,"percentile":0.0434,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284"],"published":"2026-07-15T21:21:23Z","modified":"2026-10-28T10:55:20Z","products":[{"vendor":"sandboxie-plus","product":"sandboxie"}],"references":[{"url":"https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-rmv3-fhg3-75xh","tags":["x_refsource_CONFIRM","exploit","advisory"]},{"url":"https://github.com/sandboxie-plus/Sandboxie/releases/tag/v1.17.6","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45313.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45313","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-45313","title":"Sandboxie-Plus: Sandboxie APC Injection Sandbox Escape","description":"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-\u003ehthread) and QueueUserAPC((PAPCFUNC)whk-\u003ehproc, hThread, (ULONG_PTR)req-\u003ethreadid) as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This issue is fixed in version 1.17.6.","status":"published","published":"2026-07-15T21:21:23.091Z","modified":"2026-07-16T12:52:46.717Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T13:46:32.755125Z"}],"euvd":[{"id":"EUVD-2026-44821","description":"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-\u003ehthread) and QueueUserAPC((PAPCFUNC)whk-\u003ehproc, hThread, (ULONG_PTR)req-\u003ethreadid) as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This issue is fixed in version 1.17.6.","status":"published","published":"2026-07-15T21:21:23Z","modified":"2026-07-16T12:52:46Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:19:51.881225Z"}],"nvd":[{"id":"CVE-2026-45313","description":"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-\u003ehthread) and QueueUserAPC((PAPCFUNC)whk-\u003ehproc, hThread, (ULONG_PTR)req-\u003ethreadid) as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This issue is fixed in version 1.17.6.","status":"published","published":"2026-07-15T22:16:48.873Z","modified":"2026-10-24T21:10:00.13Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:12:30.250437Z"}],"osv":[{"id":"CVE-2026-45313","title":"Sandboxie-Plus: Sandboxie APC Injection Sandbox Escape","description":"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-\u003ehthread) and QueueUserAPC((PAPCFUNC)whk-\u003ehproc, hThread, (ULONG_PTR)req-\u003ethreadid) as SYSTEM, allowing a sandboxed process to execute arbitrary code in an unsandboxed host process. This issue is fixed in version 1.17.6.","status":"published","published":"2026-07-15T21:21:23.091Z","modified":"2026-10-28T10:55:20.85959951Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:45:05.525666Z"}]}}