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CVE-2026-34459— Sandboxie-Plus sandbox escape via uninitialized memory leak and stack overflow in GetRawInputDeviceInfoSlave

Quick assessment

Affected
sandboxie-plus Sandboxie
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sandboxie-Plus是Sandboxie-Plus公司的一款沙盒隔离软件。 Sandboxie-Plus 1.17.2及之前版本存在安全漏洞，该漏洞源于SbieSvc代理服务的GetRawInputDeviceInfoSlave处理程序存在信息泄露和栈缓冲区溢出，可能导致沙箱逃逸和SYSTEM权限提升。

AI Predicted 8.8 Difficulty: Hard EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
sandboxie-plus Sandboxie < 1.17.3 affected
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I. Basic Information for CVE-2026-34459

Vulnerability Information
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Vulnerability Title
Sandboxie-Plus sandbox escape via uninitialized memory leak and stack overflow in GetRawInputDeviceInfoSlave
Source: CVE Program / CVE List V5
Vulnerability Description
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, the SbieSvc proxy service's GetRawInputDeviceInfoSlave handler contains two vulnerabilities that can be chained for sandbox escape. First, when a sandboxed process sends an IPC request with cbSize set to 0, up to 32KB of uninitialized stack memory from the service process is returned, leaking return addresses and stack cookies which bypass ASLR and /GS protections. Second, the handler performs a memcpy with an attacker-controlled length without verifying it fits within the 32KB stack buffer, enabling a stack buffer overflow. By chaining the information leak with the overflow, a sandboxed process can execute a ROP chain to achieve SYSTEM privilege escalation, even from a Security Hardened Sandbox. Hardware-enforced shadow stacks (Intel CET) prevent the ROP chain execution but do not mitigate the information leak. This issue has been fixed in version 1.17.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Sandboxie-Plus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sandboxie-Plus是Sandboxie-Plus公司的一款沙盒隔离软件。 Sandboxie-Plus 1.17.2及之前版本存在安全漏洞，该漏洞源于SbieSvc代理服务的GetRawInputDeviceInfoSlave处理程序存在信息泄露和栈缓冲区溢出，可能导致沙箱逃逸和SYSTEM权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sandboxie-plus Sandboxie < 1.17.3 -

II. Public POCs for CVE-2026-34459

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III. Intelligence Information for CVE-2026-34459

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Vendor Advisories for CVE-2026-34459 (1)

Same Patch Batch · sandboxie-plus · 2026-05-05 · 8 CVEs total

CVE-2026-32603 Sandboxie kernel driver denial of service via malformed IOCTL from sandboxed process
CVE-2026-34596 Sandboxie-Plus local privilege escalation via TOCTOU race condition in UpdUtil addon insta
CVE-2026-34462 Sandboxie-Plus ProcessServer boxname stack buffer overflows via unterminated wide string c
CVE-2026-34458 Sandboxie-Plus privilege escalation via INI CRLF injection bypassing EditAdminOnly
CVE-2026-34527 Sandboxie-Plus EditPassword hash entropy reduced from 160 bits to 80 bits due to incorrect
CVE-2026-34464 Sandboxie-Plus NamedPipeServer OpenHandler stack overflow via unterminated server field
CVE-2026-34461 Sandboxie-Plus SbieIniServer RunSbieCtrl stack buffer overflow allows local privilege esca

IV. Related Vulnerabilities

Same product: Sandboxie
Same vendor: sandboxie-plus
Same weakness: CWE-121

V. Comments for CVE-2026-34459

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