PYSEC-2026-1312

    Dashboard / Vulnerabilities / PYSEC-2026-1312

    PYSEC-2026-1312

    Published: 7 Jul 2026Last Modified: 7 Jul 2026

    Summary: DockerSpawner allows any image by default

    Details: ### Impact Users of JupyterHub deployments running DockerSpawner starting with 0.11.0 without specifying `DockerSpawner.allowed_images` configuration allow users to launch _any_ pullable image, instead of restricting to only the single configured image, as intended. ### Patches Upgrade to DockerSpawner 13. ### Workarounds Explicitly setting `DockerSpawner.allowed_images` to a non-empty list containing only the default image will result in the intended default behavior: ```python c.DockerSpawner.image = "your-image" c.DockerSpawner.allowed_images = ["your-image"] ```

    References: https://github.com/jupyterhub/dockerspawner/security/advisories/GHSA-hfgr-h3vc-p6c2, https://nvd.nist.gov/vuln/detail/CVE-2023-48311, https://github.com/jupyterhub/dockerspawner/commit/3ba4b665b6ca6027ea7a032d7ca3eab977574626, https://github.com/jupyterhub/dockerspawner, https://pypi.org/project/dockerspawner, https://github.com/advisories/GHSA-hfgr-h3vc-p6c2

    Affected packages

    Package

    Name: dockerspawner

    Purl: pkg:pypi/dockerspawner

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0.11.0
    Fixed -13.0.0

    Affected versions

    0.11.0
    0.11.1

    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
    PYSEC-2026-1312 | CVE-DB