XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileTransfer.RetrieveFiles method to redirect drag-and-drop and copy-paste data targeted at other applications to itself. Some portals generate tokens which provide access to resources. The sharing of the token transfers access to the resource and is supposed to happen out of band. The tokens were generated with g_random_int or g_uuid_string_random, both of which use GLib's GRand based on the Mersenne Twister PRNG which created a stream of reproducible random numbers. By generating enough tokens, the state of the GRand can be recover and with it, the next tokens can be predictedinsufin. This issue has been patched in version 1.22.1.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3384 advisory.

    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. (CVE-2026-55888)

    XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed     applications can use the FileTransfer.RetrieveFiles method to redirect drag-and-drop and copy-paste data     targeted at other applications to itself. Some portals generate tokens which provide access to resources.
    The sharing of the token transfers access to the resource and is supposed to happen out of band. The     tokens were generated with g_random_int or g_uuid_string_random, both of which use GLib's GRand based on     the Mersenne Twister PRNG which created a stream of reproducible random numbers. By generating enough     tokens, the state of the GRand can be recover and with it, the next tokens can be predictedinsufin. This     issue has been patched in version 1.22.1. (CVE-2026-55889)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:5098-1 advisory.

    - CVE-2026-40354: file deletion via symlink attack (bsc#1262045).
    - CVE-2026-55888: arbitrary file access due to `SaveFiles` `files` option path traversal (bsc#1287724).
    - CVE-2026-55889: drag-and-drop and copy-paste theft due to predictable `FileTransfer` key (bsc#1287725).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed     applications can use the FileTransfer.RetrieveFiles method to redirect drag-and-drop and copy-paste data     targeted at other applications to itself. Some portals generate tokens which provide access to resources.
    The sharing of the token transfers access to the resource and is supposed to happen out of band. The     tokens were generated with g_random_int or g_uuid_string_random, both of which use GLib's GRand based on     the Mersenne Twister PRNG which created a stream of reproducible random numbers. By generating enough     tokens, the state of the GRand can be recover and with it, the next tokens can be predictedinsufin. This     issue has been patched in version 1.22.1. (CVE-2026-55889)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-d8f8abf763 advisory.

    Update to 1.22.1

    It fixes  CVE-2026-55888 and  CVE-2026-55889.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
377960	Amazon Linux 2023 : xdg-desktop-portal, xdg-desktop-portal-devel (ALAS2023-2026-3384)	Nessus	Amazon Linux Local Security Checks	Local	high
376962	SUSE SLES15: xdg-desktop-portal / xdg-desktop-portal-devel / etc (SUSE-SU-2026:5098-1)	Nessus	SuSE Local Security Checks	Local	high
371572	Linux Distros Unpatched Vulnerability : CVE-2026-55889	Nessus	Misc.	Local	high
321853	Fedora 44 : xdg-desktop-portal (2026-d8f8abf763)	Nessus	Fedora Local Security Checks	Local	high

Detections

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CVE-2026-55889

high

Tenable Plugins

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high

high

high