A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at arbitrary paths, and host directory listings can be disclosed to sandboxed applications using the extension. Additionally, unvalidated extension metadata can cause extension content to be mounted at unintended locations inside the sandbox.

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

Avoid installing Flatpak extensions from non-trusted sources.

History

Sun, 27 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Description A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at arbitrary paths, and host directory listings can be disclosed to sandboxed applications using the extension. Additionally, unvalidated extension metadata can cause extension content to be mounted at unintended locations inside the sandbox.
Title Flatpak: flatpak: extension metadata path traversal file existence oracle
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-59
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-27T21:53:43.645Z

Reserved: 2026-09-22T20:43:56.596Z

Link: CVE-2026-96282

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-27T22:17:06.430

Modified: 2026-09-27T22:17:06.430

Link: CVE-2026-96282

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses