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    CVE-2026-96275

    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:Sep 23, 2026
    Last Modified:Oct 29, 2026
    EPS:Sep 23, 2026
    EPSS Score:0.00485
    CVSS Score:8.8

    Affected Products

    Vendor
    Flatpak
    Product
    Flatpak
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-92162 (CVSS 7.2) — Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Prior to …
    CVE-2026-97027 (CVSS 3.6) — Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entr…
    CVE-2026-97029 (CVSS 5.7) — Flatpak's process ID namespace separation does not prevent a sandboxed app's kill(0, signal) or killpg(0, sign…
    CVE-2026-97025 (CVSS 3.2) — Flatpak writes the OCI repository authentication token with world-readable permissions (0644) in the system-he…
    CVE-2026-97024 (CVSS 7.1) — A path traversal vulnerability in Flatpak's handling of the files/etc directory during app deployment allows a…
    CVE-2026-97023 (CVSS 7.1) — A path traversal vulnerability in Flatpak's handling of the export/bin directory during app deployment allows …
    CVE-2026-97026 (CVSS 3.9) — Flatpak creates temporary child repository directories under the user cache with world-writable permissions (0…
    CVE-2026-96284 (CVSS 2.5) — A malicious user can get read-access to files in the flatpak-system-helper context if a system OCI repository …
    CVE-2026-96282 (CVSS 3.1) — A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at a…
    CVE-2026-96283 (CVSS 3.3) — By calling org.freedesktop.Flatpak.SystemHelper.CancelPull on another user's pull, the pull is not actually ca…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High