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XDG Desktop Portal: Arbitrary file access via SaveFiles "files" option path traversal

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-55888

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-55888

xdg-desktop-portal

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "flatpak",
    "product": "xdg-desktop-portal",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.22.1"
      }
    ]
  }
]
Related CVEs
CVE-2026-55888

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#52821 · Revision 1
Added to Heist Feed
Publisher date
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