Is CVE-2020-26261 in the CISA KEV catalog?

No. CVE-2020-26261 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-26261?

CVE-2020-26261 has a CVSS v3 base score of 7.9 (HIGH).

What is the EPSS score for CVE-2020-26261?

CVE-2020-26261 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-26261?

Upgrade systemdspawner to 0.15 or later.

CVE & CISA-KEV Catalog

CVE-2020-26261

HIGH

7.9

CVSS v3

NVD

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

CWE-668

How to fix

Remediation Available

systemdspawnerNVD

Affected:< 0.15Fixed in:0.15CVE-2020-26261derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory3

Related Vulnerabilities

Other CWE-668 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2017-16597	Critical	9.8	57%	-	-
CVE-2017-16603	High	8.8	54%	-	-
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2017-0215	Medium	5.3	36%	-	-
CVE-2022-25236	Critical	9.8	34%	-	Fix

Embed a live status badge for CVE-2020-26261

Markdown

[![CVE-2020-26261](https://tridentstack.com/cve/badge/CVE-2020-26261.svg)](https://tridentstack.com/cve/CVE-2020-26261)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-26261"><img src="https://tridentstack.com/cve/badge/CVE-2020-26261.svg" alt="CVE-2020-26261"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.