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 c

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.

Affected Products

References

• https://github.com/flatpak/xdg-desktop-portal/releases/tag/1.21.1
• https://github.com/flatpak/xdg-desktop-portal/releases/tag/1.20.4
• https://www.openwall.com/lists/oss-security/2026/04/10/14
• https://github.com/flatpak/xdg-desktop-portal/security/advisories/GHSA-rqr9-jwwf-wxgj

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