CVE-2026-10037: Canonical Ubuntu

High severity, CVSS 8.8. EPSS: 0.2% chance of exploitation in the next 30 days.

A sandbox escape vulnerability exists in the OpenJDK packages provided in Ubuntu. The .jar MIME handlers installed by these packages execute files marked as executable when the mailcap package is installed. A compromised or malicious sandboxed application with access to the OpenURI portal via xdg-desktop-portal-gtk can write a malicious .jar file to the host file system, set its executable bit, and trigger the handler to execute arbitrary code outside of the sandbox environment.

Affected products

• Canonical Ubuntu: before 3.70+nmu1ubuntu1.22.04.1 (fixed in 3.70+nmu1ubuntu1.22.04.1); before 3.70+nmu1ubuntu1.24.04.1 (fixed in 3.70+nmu1ubuntu1.24.04.1); before 3.74ubuntu1.1 (fixed in 3.74ubuntu1.1); before 3.75ubuntu1.1 (fixed in 3.75ubuntu1.1)

Published 2026-07-08. Last modified 2026-07-14.