Medium

DockerSpawner allows any image by default

Disclosed: 08.12.2023
Updated: 11.10.2026 13:19

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"]

Affected software

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Platform	Package	Vulnerable versions	Fixed in
Python (PyPI)	dockerspawner	>= 0.11.0, < 13.0.0	13.0.0

References

CVSS score 4.3/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-20
Platform: Python (PyPI)
Package: dockerspawner
Disclosed: 08.12.2023
Updated: 11.10.2026 13:19

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-1312 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-hfgr-h3vc-p6c2 - CC BY 4.0

Vulnerability history: dockerspawner

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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