CVE-2026-40354
2.9 · LOWOverview
CVE-2026-40354 is a low-severity vulnerability affecting flatpak xdg-desktop-portal. It was published on April 11, 2026 and has a CVSS 3.1 base score of 2.9 (LOW).
This vulnerability has a CVSS 3.1 base score of 2.9, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from flatpak. Update xdg-desktop-portal to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| flatpak | xdg-desktop-portal | >= 0, < 1.20.4 | Affected |
Frequently Asked Questions
What is CVE-2026-40354?
CVE-2026-40354 is a low-severity vulnerability affecting flatpak xdg-desktop-portal. It was published on April 11, 2026 and has a CVSS 3.1 base score of 2.9 (LOW).
How severe is CVE-2026-40354?
This vulnerability has a CVSS 3.1 base score of 2.9, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-40354?
Check the references section for vendor advisories and patches from flatpak. Update xdg-desktop-portal to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-40354?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-40354 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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