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Vulnerabilities

Vulnerability · 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.

Published Apr 11, 2026 · catalog updated Jun 17, 2026 · Flatpak xdg-desktop-portal before 1.20.4

Check if you run it

No confirmed exploitation is on record for CVE-2026-40354. EPSS is 0.16%. Act only if a listed version of Flatpak xdg-desktop-portal before 1.20.4 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Flatpak xdg-desktop-portal before 1.20.4).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.16%
Remediation
Advisory link
Affected products
cpe flatpak/xdg-desktop-portal

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe flatpak/xdg-desktop-portal1.21.0

How to fix CVE-2026-40354

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-40354. EPSS is 0.16%. Act only if a listed version of Flatpak xdg-desktop-portal before 1.20.4 is installed.

Which versions are affected?

Compare what you have installed with 1.21.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-61. EPSS 0.16%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 11, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-40354

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-40354

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.