CVSS 3.1
7.9 highCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:NCVE-2020-26261
High (7.9) in jupyterhub systemdspawner. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in jupyterhub-systemdspawner 0.15.0.
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
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-31)
- CWE
- CWE-668
- Published
- Modified
- Record from
- the NVD, synced
Affected
- jupyterhub:systemdspawner
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-cg54-gpgr-4rm6 | PyPI | jupyterhub-systemdspawner | <0.15.0 | 0.15.0 |
| PYSEC-2020-52 | PyPI | jupyterhub-systemdspawner | <0.15.0 | 0.15.0 |
References
- https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015
- https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580
- https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6
- https://pypi.org/project/jupyterhub-systemdspawner/
- https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015