UBUNTU-CVE-2026-34078

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    UBUNTU-CVE-2026-34078

    Published: 7 Apr 2026Last Modified: 10 Sept 2026
    Upstream:
    CVE-2026-34078
    Aliases:
    USN-8741-1

    Summary:

    Details: Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox. This gives apps access to all host files and can be used as a primitive to gain code execution in the host context. This vulnerability is fixed in 1.16.4.

    References: https://ubuntu.com/security/CVE-2026-34078, https://www.cve.org/CVERecord?id=CVE-2026-34078, https://github.com/flatpak/flatpak/security/advisories/GHSA-cc2q-qc34-jprg, https://ubuntu.com/security/notices/USN-8741-1

    Affected packages

    Package

    Name: flatpak

    Purl: pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fbionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.8.7-5

    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
    UBUNTU-CVE-2026-34078 | CVE-DB