What’s Vulnerable › Vulnerabilities
CVE-2026-10037: Sandbox Escape in Ubuntu OpenJDK Packages via xdg-desktop-portal
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-08 · updated 2026-10-25
- Weakness: CWE-20
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.
Affected products
- Canonical Ubuntu: before 3.70+nmu1ubuntu1.22.04.1; before 3.70+nmu1ubuntu1.24.04.1; before 3.74ubuntu1.1; before 3.75ubuntu1.1 — fixed in 3.70+nmu1ubuntu1.22.04.1, 3.70+nmu1ubuntu1.24.04.1, 3.74ubuntu1.1, 3.75ubuntu1.1
How to fix
Upgrade to a fixed version: Canonical Ubuntu 3.70+nmu1ubuntu1.22.04.1, 3.70+nmu1ubuntu1.24.04.1, 3.74ubuntu1.1, 3.75ubuntu1.1. Check the vendor advisory for mitigations.
References
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