CVE-2026-34461 Details
Description
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, the SbieIniServer RunSbieCtrl handler contains a stack buffer overflow. The MSGID_SBIE_INI_RUN_SBIE_CTRL message is handled before normal sandbox and impersonation checks, and for non-sandboxed callers, the handler copies the trailing message payload into a fixed-size WCHAR ctrlCmd[128] stack buffer using memcpy without verifying the length fits within the buffer. The service pipe is created with a NULL DACL, allowing any local interactive process to connect and send an oversized payload to overflow the stack. 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.
A stack buffer overflow vulnerability has been identified in Sandboxie-Plus versions through 1.17.2. The issue arises in the SbieIniServer RunSbieCtrl message handler, which processes the MSGID_SBIE_INI_RUN_SBIE_CTRL message before performing standard sandbox and impersonation checks. For non-sandboxed callers, the handler improperly copies an oversized message payload into a fixed-size stack buffer without verifying the payload length, potentially leading to a crash of the SbieSvc service or allowing code execution with SYSTEM privileges. The vulnerability can be exploited by any local interactive process.
Users are advised to update to Sandboxie-Plus version 1.17.3, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-wpjw-jh2p-gwx7 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sandboxie-plus sandboxie | < 1.17.3 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 7, 2026 | Initial Analysis | [email protected] |
| May 7, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | CVE Modified | CISA-ADP |
| May 5, 2026 | New CVE Received | [email protected] |