user-readable api tokens in systemd units for JupyterHub
Impact
user API tokens issued to single-user servers are specified in the environment of systemd units, which are accessible to all users.
In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default.
Patches
Patched in jupyterhub-systemdspawner v0.15
Workarounds
No workaround other than upgrading systemdspawner to 0.15
For more information
If you have any questions or comments about this advisory:
- Open a thread in the Jupyter forum
- Email us at security@ipython.org
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | jupyterhub-systemdspawner | < 0.15.0 | 0.15.0 |
References
- https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6
- https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580
- https://pypi.org/project/jupyterhub-systemdspawner/
- https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015
- https://nvd.nist.gov/vuln/detail/CVE-2020-26261
- https://github.com/jupyterhub/systemdspawner
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-systemdspawner/PYSEC-2020-52.yaml
- https://pypi.org/project/jupyterhub-systemdspawner
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N- Weakness (CWE)
CWE-668- Platform
- Python (PyPI)
- Package
jupyterhub-systemdspawner- Disclosed
- 09.12.2020
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2020-52 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-cg54-gpgr-4rm6 - CC BY 4.0
Vulnerability history: jupyterhub-systemdspawner
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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