What is CVE-2026-34459?

CVE-2026-34459 is a high-severity vulnerability in Sandboxie-plus Sandboxie, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-05-05.

How severe is CVE-2026-34459?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Sandboxie-plus Sandboxie

CVE-2026-34459

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 esca…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Sandboxie-plus Sandboxie — versions < 1.17.3

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-7cpc-5hv7-rfmh (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34459?: CVE-2026-34459 is a high-severity vulnerability in Sandboxie-plus Sandboxie, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-05-05.
How severe is CVE-2026-34459?: High severity. CVSS v3 base score is 8.8 out of 10.