Vulnerability Description
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, an INI injection vulnerability allows any standard local user to bypass configuration restrictions (EditAdminOnly and ConfigPassword) and inject arbitrary directives into the global Sandboxie.ini configuration file. The background service skips authorization checks for IPC messages targeting sections beginning with UserSettings_, but does not sanitize CRLF characters in either the value parameter (via MSGID_SBIE_INI_ADD_SETTING) or the setting name parameter (via MSGID_SBIE_INI_SET_SETTING). An attacker can inject a new sandbox section header with unrestricted permissions, enabling sandbox escape and SYSTEM privilege escalation. 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/releases/tag/v1.17.3PatchRelease Notes
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-6xqg-2cjq-9ExploitVendor Advisory
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-6xqg-2cjq-9ExploitVendor Advisory
FAQ
What is CVE-2026-34458?
CVE-2026-34458 is a vulnerability with a CVSS score of 8.8 (HIGH). Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, an INI injection vulnerability allows any standard local user to bypass configuration res...
How severe is CVE-2026-34458?
CVE-2026-34458 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34458?
Check the references section above for vendor advisories and patch information. Affected products include: Sandboxie-Plus Sandboxie.