CVE-2026-10037
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Ubuntu
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- Canonical Ubuntu3.70+nmu1ubuntu1.22.04.1, 3.70+nmu1ubuntu1.24.04.1, 3.74ubuntu1.1, 3.75ubuntu1.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Canonical Ubuntu | v < 3.70+nmu1ubuntu1.22.04.1, v < 3.70+nmu1ubuntu1.24.04.1, v < 3.74ubuntu1.1, v < 3.75ubuntu1.1 | 3.70+nmu1ubuntu1.22.04.1, 3.70+nmu1ubuntu1.24.04.1, 3.74ubuntu1.1, 3.75ubuntu1.1 |
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