Description
A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.
Published: 2026-09-23
Score: 8.8 High
EPSS: n/a
KEV: No
AI Analysis

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Remediation

Vendor Workaround

Avoid installing Flatpak extensions from non-trusted sources.

Tracking

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Advisories

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History

Wed, 23 Sep 2026 15:15:00 +0000

Type Values Removed Values Added
Description A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.
Title Flatpak: flatpak: arbitrary write access as root via extra-data extraction
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-22
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': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Subscriptions

Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-23T16:08:11.613Z

Reserved: 2026-09-22T20:42:17.038Z

Link: CVE-2026-96275

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-23T15:17:32.180

Modified: 2026-09-23T15:17:32.180

Link: CVE-2026-96275

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T17:00:08Z

Weaknesses