# CVE-2026-55888: xdg-desktop-portal: XDG Desktop Portal is a desktop integration portal

CVE-2026-55888 is fixed in xdg-desktop-portal on 1 platform by DEBIAN-CVE-2026-55888 (version 1.22.1+ds-1), released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-55888
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 23, 2026

## Description

XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileChooser.SaveFiles method to gain arbitrary file access to non-existing files on the host (limited to files the user has access to). The FileChooser.SaveFiles method takes optional filenames which get appended to the selected directory by backends. The backends are supposed to check that the file does not exist yet. The filenames are not validated by the frontend and also not by common backends. This issue has been patched in version 1.22.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xdg-desktop-portal Debian 14 | 1.22.1+ds-1 | [DEBIAN-CVE-2026-55888](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55888.md) | Oct 24, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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