# CVE-2026-40354: 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 hos...

CVE-2026-40354 is fixed in 5 products on 1 platform, first by xdg-desktop-portal 1.18.4-1ubuntu2.24.04.2, released April 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-40354
- Priority: Routine
- CVSS: 6.3 (medium)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 10, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xdg-desktop-portal Debian 14 | 1.20.4+ds-1 | [DEBIAN-CVE-2026-40354](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40354.md) | Apr 11, 2026 |
| Linux | xdg-desktop-portal Ubuntu 24.04.5 LTS (noble) | 1.18.4-1ubuntu2.24.04.2 | [xdg-desktop-portal 1.18.4-1ubuntu2.24.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-xdg-desktop-portal-1.18.4-1ubuntu2.24.04.2.md) | Apr 10, 2026 |
| Linux | xdg-desktop-portal Ubuntu 25.10 (questing) | 1.20.3+ds-1ubuntu1.1 | [xdg-desktop-portal 1.20.3+ds-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-xdg-desktop-portal-1.20.3-ds-1ubuntu1.1.md) | Apr 10, 2026 |
| Linux | xdg-desktop-portal amzn 2023 | 1.18.4-107.amzn2023 | [ALAS2023-2026-1669](https://patchblox.com/security/data/fix/linux/alas2023-2026-1669.md) | May 11, 2026 |
| Linux | xdg-desktop-portal sles 15.7 | 1.18.2-150600.4.6.1 | [SUSE-SU-2026:2712-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2712-1.md) | Jun 30, 2026 |
| Linux | xdg-desktop-portal-debuginfo amzn 2023 | 1.18.4-107.amzn2023 | [ALAS2023-2026-1669](https://patchblox.com/security/data/fix/linux/alas2023-2026-1669.md) | May 11, 2026 |
| Linux | xdg-desktop-portal-debugsource amzn 2023 | 1.18.4-107.amzn2023 | [ALAS2023-2026-1669](https://patchblox.com/security/data/fix/linux/alas2023-2026-1669.md) | May 11, 2026 |
| Linux | xdg-desktop-portal-devel amzn 2023 | 1.18.4-107.amzn2023 | [ALAS2023-2026-1669](https://patchblox.com/security/data/fix/linux/alas2023-2026-1669.md) | May 11, 2026 |
| Linux | xdg-desktop-portal-tests Ubuntu 24.04.5 LTS (noble) | 1.18.4-1ubuntu2.24.04.2 | [xdg-desktop-portal-tests 1.18.4-1ubuntu2.24.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-xdg-desktop-portal-tests-1.18.4-1ubuntu2.24.04.2.md) | Apr 10, 2026 |
| Linux | xdg-desktop-portal-tests Ubuntu 25.10 (questing) | 1.20.3+ds-1ubuntu1.1 | [xdg-desktop-portal-tests 1.20.3+ds-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-xdg-desktop-portal-tests-1.20.3-ds-1ubuntu1.1.md) | Apr 10, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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