CVE intelligence

CVE-2026-40354

Vulnerability intelligence

Published Apr 11, 2026Sources checked Nov 10, 2026

6.3MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-40354 and is rated Medium severity with a CVSS score of 6.3. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Ubuntu Security Notices guidance

Vendor revision: Sep 23, 2026

USN-8287-1 fixed a vulnerability in XDG Desktop Portal.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-40354?

Flatpak xdg-desktop-portal before 1.20.4 and 1.21.x before 1.21.1 allows any Flatpak app to trash any file in the host context via a symlink attack on g_file_trash.

Source: NVD