Vulnerability Description
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, several ProcessServer handlers (KillAllHandler, SuspendAllHandler, and RunSandboxedHandler) copy a WCHAR boxname[34] field from request structures into WCHAR[40] stack buffers using wcscpy without verifying null termination. Because the service pipe accepts variable-length packets larger than the request structure, an attacker can fill the boxname field with non-zero data and append additional controlled wide characters after the structure. wcscpy then reads past the fixed field and overflows the destination stack buffer. The service pipe is created with a NULL DACL, allowing any local process to connect, and the unsafe copy occurs before authorization checks. This can lead to a crash of the SbieSvc service or potential code execution as SYSTEM. This issue has been fixed in version 1.17.3.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sandboxie-Plus | Sandboxie | < 1.17.3 |
Related Weaknesses (CWE)
References
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-9cjg-vh9m-hExploitMitigationVendor Advisory
FAQ
What is CVE-2026-34462?
CVE-2026-34462 is a vulnerability with a CVSS score of 7.8 (HIGH). Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, several ProcessServer handlers (KillAllHandler, SuspendAllHandler, and RunSandboxedHandle...
How severe is CVE-2026-34462?
CVE-2026-34462 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34462?
Check the references section above for vendor advisories and patch information. Affected products include: Sandboxie-Plus Sandboxie.