CVE-2020-26261
Description
jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemdspawner before version 0.15 user API tokens issued to single-user servers are specified in the environment of systemd units. These tokens are incorrectly accessible to all users. In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default. This is patched in jupyterhub-systemdspawner v0.15
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | jupyterhub-systemdspawner | <0.15.0 | 0.15.0 |
| PyPI | jupyterhub-systemdspawner | <a4d08fd2ade1cfd0ef2c29dc221e649345f23580||<0.15.0 | a4d08fd2ade1cfd0ef2c29dc221e649345f23580 |
References
- https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6
- https://nvd.nist.gov/vuln/detail/CVE-2020-26261
- https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580
- https://github.com/jupyterhub/systemdspawner
- https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-systemdspawner/PYSEC-2020-52.yaml
- https://pypi.org/project/jupyterhub-systemdspawner
- https://pypi.org/project/jupyterhub-systemdspawner/
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.