Improper input validation in Canonical Ubuntu
CVE-2026-10037
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.001 (2.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Canonical Ubuntu — versions 0
Weakness classification (CWE)
References
- security@ubuntu.com (issue-tracking)
Frequently asked questions
- What is CVE-2026-10037?
- CVE-2026-10037 is a high-severity vulnerability in Canonical Ubuntu, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-07-08.
- How severe is CVE-2026-10037?
- High severity. CVSS v3 base score is 8.8 out of 10.