High severity7.9NVD Advisory· Published Dec 9, 2020· Updated Jun 17, 2026
CVE-2020-26261
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
jupyterhub-systemdspawnerPyPI | < 0.15.0 | 0.15.0 |
Affected products
3cpe:2.3:a:jupyterhub:systemdspawner:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:jupyterhub:systemdspawner:*:*:*:*:*:*:*:*range: <0.15
- (no CPE)range: < 0.15
Patches
Vulnerability mechanics
References
8- github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580nvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-cg54-gpgr-4rm6ghsaADVISORY
- github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.mdnvdRelease NotesThird Party AdvisoryWEB
- github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6nvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2020-26261ghsaADVISORY
- pypi.org/project/jupyterhub-systemdspawner/nvdProductThird Party Advisory
- github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-systemdspawner/PYSEC-2020-52.yamlghsaWEB
- pypi.org/project/jupyterhub-systemdspawnerghsaWEB
News mentions
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