Sebastian Wick
30faeb539b
The .token file was written into the child-oci directory so the
system helper could read it back for remote registry verification.
However, the system helper only ever opens the child-oci registry
as a local source (dfd != -1), and every code path that uses
self->token for HTTP requests is gated behind dfd == -1. The token
was never reachable since it was introduced in commit 5d8fd2d1b.
Persisting credentials to a world-traversable directory in /var/tmp
is a security risk on multi-user systems. Remove the file write
from set_token and the file read from ensure_local. The token
remains available in memory for the client process that actually
needs it for remote access.
Resolves: CVE-2026-97025
Resolves: https://github.com/flatpak/flatpak/security/advisories/GHSA-7rvf-rqr3-43j4
Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.
See https://flatpak.org/ for more information.
Flatpak is available in the package repositories of most Linux distributions and can be installed from there. See https://flatpak.org/setup/ for quick setup instructions for many distributions.
Community discussion happens in #flatpak:matrix.org, on the mailing list, and on the Flathub Discourse.
Read documentation for Flatpak here.
Contributing
Flatpak welcomes contributions from anyone! Here are some ways you can help:
- Fix one of the issues and submit a PR
- Update flatpak's translations
- Improve flatpak's documentation, hosted at http://docs.flatpak.org and developed over in flatpak-docs
- Find a bug and submit a detailed report including your OS, flatpak version, and the steps to reproduce
- Add your favorite application to Flathub by writing a flatpak-builder manifest and submitting it
- Improve the Flatpak support in your favorite Linux distribution
Hacking
See CONTRIBUTING.md
Related Projects
Here are some notable projects in the Flatpak ecosystem:
- Flatseal: An app for managing permissions of Flatpak apps without using the CLI
- Flat-manager: A tool for managing Flatpak repositories
Host Requirements
Flatpak aims to run on a wide variety of systems. It is therefore conservative with required dependency versions and kernel features.
Currently, the main branch requires at least kernel version 5.8 (for
statx STATX_MNT_ID).