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 for submit@bugs.debian.org; Tue, 07 Apr 2026 21:42:19 +0000
Date: Tue, 7 Apr 2026 22:42:17 +0100
From: Simon McVittie <smcv@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: flatpak: GHSA-2fxp-43j9-pwvc: Arbitrary read-access to files
 readable by _flatpak user
Message-ID: <adV6OeQqm63fzRBR@definition.pseudorandom.co.uk>
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Package: flatpak
Severity: minor
Tags: security
X-Debbugs-Cc: Debian Security Team <team@security.debian.org>

In Flatpak older than 1.16.4, a local user can obtain read access to any 
file that is readable by the user account running flatpak-system-helper 
(in Debian, this is the "_flatpak" user). A mitigation is that usually 
that user account can only read files that are world-readable anyway, 
and a further mitigation is that this is only possible if a system OCI 
repository is configured (rarely done on non-Fedora systems).

No CVE ID has been allocated: it wasn't clear whether this is a security 
vulnerability at all, or just a bug, but out of an abundance of caution 
it went through the process for dealing with embargoed vulnerabilities.

I think we should fix this in the same batch as the much more serious 
CVE-2026-34078.

Thanks,
    smcv
]