Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a Time-of-Check-to-Time-of-Use (TOCTOU) race condition exists during addon installation. When a user installs an addon through the SandMan interface, UpdUtil.exe is spawned as SYSTEM by SbieSvc but stages files in the user-writable %TEMP%\sandboxie-updater directory. After UpdUtil verifies file hashes against the signed addon manifest, install.bat extracts files.cab and executes config.exe from its contents. Between hash verification and extraction, an unprivileged user can replace files.cab with a crafted cabinet containing a malicious executable, which is then run as SYSTEM. No UAC prompt is required.
This issue has been fixed in version 1.17.3.
References
| Link | Resource |
|---|---|
| https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585 | Exploit Vendor Advisory |
| https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585 | Exploit Vendor Advisory |
Configurations
History
07 May 2026, 19:45
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.0 |
| CPE | cpe:2.3:a:sandboxie-plus:sandboxie:*:*:*:*:plus:*:*:* | |
| References | () https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585 - Exploit, Vendor Advisory | |
| First Time |
Sandboxie-plus sandboxie
Sandboxie-plus |
06 May 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585 - |
05 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-05 20:16
Updated : 2026-05-07 19:45
NVD link : CVE-2026-34596
Mitre link : CVE-2026-34596
CVE.ORG link : CVE-2026-34596
JSON object : View
Products Affected
sandboxie-plus
- sandboxie
CWE
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition