CVE-2026-10037 Sandbox Escape in Ubuntu OpenJDK Packages via xdg-desktop-portal
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-10037?
CVE-2026-10037 is a high-severity vulnerability in Canonical Ubuntu, published on 8 Jul 2026.
Official description
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.
Weakness: CWE-20
Which versions are affected by CVE-2026-10037?
How do I fix CVE-2026-10037?
Upgrade to a fixed version.
Is CVE-2026-10037 being exploited?
There is no known exploitation of CVE-2026-10037 in the wild and no public exploit code.
Sources
Also known as GHSA-xg8h-3f4m-39v6, UBUNTU-CVE-2026-10037, USN-8518-1.