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CVE-2020-26261

23
FAUCET Score

CVE-2020-26261 affects jupyterhub-systemdspawner versions prior to 0.15, where user API tokens for single-user notebook servers are exposed in systemd unit environments, making them accessible to all users. This vulnerability carries a CVSS score of 7.9 (HIGH), indicating a local attack vector with low complexity, requiring user interaction, and potentially leading to high confidentiality and integrity impacts. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.15CPE matchmatch criteria
cpe:2.3:a:jupyterhub:systemdspawner:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.9HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.5
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 70th percentile among its peer group of 759 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: jupyterhub-systemdspawnerFixed in: 0.15.0

Vendor Advisories (1)

pipGHSA-cg54-gpgr-4rm6high

user-readable api tokens in systemd units for JupyterHub

Dec 9, 2020

References

github.com / jupyterhub/systemdspawner/blob/master/CHANGELOG.md
Release NotesThird Party Advisory
github.com / jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580
PatchThird Party Advisory
github.com / jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6
Third Party Advisory
pypi.org / project/jupyterhub-systemdspawner
ProductThird Party Advisory