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Fedora 44 flatpak-builder Critical Fix CVE-2026-39977 Path Traversal

fedora
Calendar Grey April 25, 2026
Dist Fedora Esm H88
Update addresses CVE-2026-39977 in flatpak-builder for Fedora 44 resolving a critical file read attack.
This update includes a fix for CVE-2026-39977

Summary

Flatpak-builder is a tool for building flatpaks from sources.

See https://flatpak.org/ for more information.

Update Information:

This update includes a fix for CVE-2026-39977. See also: the upstream advisory

Topics%20covered

Topics Covered

security advisory fedora path traversal arbitrary file read flatpak-builder cve-2026-39977

Change Log

* Wed Apr 15 2026 Adrian Vovk - 1.4.8-1 - Update to 1.4.8 (#2457166) * Wed Mar 25 2026 Jan Grulich - 1.4.7-5 - Add configuration for release-monitoring

References


[ 1 ] Bug #2457166 - flatpak-builder-1.4.8 is available https://bugzilla.redhat.com/show_bug.cgi?id=2457166 [ 2 ] Bug #2457894 - CVE-2026-39977 flatpak-builder: path traversal leading to arbitrary file read on host when installing licence files [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2457894

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-5e62b78a0c' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
critical
Lowest
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Critical

Name: flatpak-builder
Product: Fedora 44
Version: 1.4.8
Release: 1.fc44
URL: https://flatpak.org/
Summary: Tool to build flatpaks from source

Topics%20covered

Topics Covered

security advisory fedora path traversal arbitrary file read flatpak-builder cve-2026-39977

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