---
id: CVE-2026-107466
title: A flaw was found in flatpak-builder
summary: >-
  A flaw was found in flatpak-builder. This vulnerability allows an attacker to
  cause information disclosure by convincing a user or continuous integration
  (CI) system to process a crafted build manifest. By specifying local file
  Uniform R…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N'
cwe:
  - CWE-22
vendor: Red Hat
product: flatpak-builder
affected:
  - flatpak-builder (all versions)
  - flatpak-builder (all versions)
  - flatpak-builder (all versions)
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T08:16:34.193'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107466'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-107466'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2471600'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-08T09:24:17.828Z'
---

## Overview

A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.