OpenJDK Sandbox Escape via .jar MIME Handler on Ubuntu
CVE-2026-10037 Published on July 8, 2026

Sandbox Escape in Ubuntu OpenJDK Packages via xdg-desktop-portal
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.

NVD

Vulnerability Analysis

CVE-2026-10037 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.


Affected Versions

Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: Canonical Ubuntu: