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

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Summary

CVECVE-2026-10037
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 22:17:12 UTC
Updated2026-07-08 22:17:12 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem Types: CWE-20 | CWE-20 CWE-20 Improper input validation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu Not specified Not specified
CNA Canonical Ubuntu affected 3.70+nmu1ubuntu1.22.04.1 custom Not specified
CNA Canonical Ubuntu affected 3.70+nmu1ubuntu1.24.04.1 custom Not specified
CNA Canonical Ubuntu affected 3.74ubuntu1.1 custom Not specified
CNA Canonical Ubuntu affected 3.75ubuntu1.1 custom Not specified

References

ReferenceSourceLinkTags
bugs.launchpad.net/ubuntu/+source/openjdk-25/+bug/2153100 [email protected] bugs.launchpad.net
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Aaron Rainbolt (en)

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