id: PYSEC-2026-1312
published: "2026-07-07T11:45:28.248139Z"
modified: "2026-07-07T17:24:02.988455Z"
aliases:
- CVE-2023-48311
- GHSA-hfgr-h3vc-p6c2
summary: DockerSpawner allows any image by default
details: "### Impact\n\nUsers 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.\n\n### Patches\n\nUpgrade to DockerSpawner 13.\n\n### Workarounds\n\nExplicitly setting `DockerSpawner.allowed_images` to a non-empty list containing only the default image will result in the intended default behavior:\n\n```python\nc.DockerSpawner.image = \"your-image\"\nc.DockerSpawner.allowed_images = [\"your-image\"]\n```\n"
affected:
- package:
    name: dockerspawner
    ecosystem: PyPI
    purl: pkg:pypi/dockerspawner
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 0.11.0
    - fixed: 13.0.0
  versions:
  - 0.11.0
  - 0.11.1
  - 12.0.0
  - 12.1.0
references:
- type: WEB
  url: https://github.com/jupyterhub/dockerspawner/security/advisories/GHSA-hfgr-h3vc-p6c2
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2023-48311
- type: WEB
  url: https://github.com/jupyterhub/dockerspawner/commit/3ba4b665b6ca6027ea7a032d7ca3eab977574626
- type: PACKAGE
  url: https://github.com/jupyterhub/dockerspawner
- type: PACKAGE
  url: https://pypi.org/project/dockerspawner
- type: ADVISORY
  url: https://github.com/advisories/GHSA-hfgr-h3vc-p6c2
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N