High severity · published Jul 8, 2026
CVE-2026-10037
Sandbox Escape in Ubuntu OpenJDK Packages via xdg-desktop-portal
8.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UB
Ubuntu · Canonical
before 3.70+nmu1ubuntu1.22.04.1; before 3.70+nmu1ubuntu1.24.04.1; before 3.74ubuntu1.1; before 3.75ubuntu1.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-10037
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-10037
bugs.launchpad.net
https://bugs.launchpad.net/ubuntu/+source/openjdk-25/+bug/2153100
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