CVE-2020-26261

user-readable api tokens in systemd units

HIGH
7.9
CVSS Score
Published: December 9, 2020 at 04:30 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
1 product affected across 1 vendorSystemdspawner

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Severity
HIGH7.9
Exploit prediction
EPSS 0.5%

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.15
Affected range stops below 0.15, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

7.9HIGHGitHub_M
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-668

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