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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-39160

27
FAUCET Score

CVE-2021-39160 is a critical arbitrary code execution vulnerability affecting nbgitpuller, a Jupyter server extension. Due to unsanitized input, visiting a maliciously crafted link could allow an attacker to execute arbitrary code in the user's environment. This vulnerability has a CVSS score of 8.8 (High), indicating a network-based attack with low complexity, requiring user interaction, and leading to high impact on confidentiality, integrity, and availability. While no active exploitation, public exploits, or significant community discussion have been observed, users are strongly advised to upgrade to version 0.10.2 immediately as no workaround exists.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.9.0, < 0.10.2CPE matchmatch criteria
cpe:2.3:a:jupyterhub:nbgitpuller:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.73%
Probability of exploitation in next 30 days
EPSS Percentile
75.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0173 is in the 74th percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: nbgitpullerFixed in: 0.10.2

Vendor Advisories (1)

pipGHSA-mq5p-2mcr-m52jhigh

Code injection in nbgitpuller

Aug 30, 2021

References

github.com / jupyterhub/nbgitpuller/blob/main/CHANGELOG.md
Release NotesThird Party Advisory
github.com / jupyterhub/nbgitpuller/commit/07690644f29a566011dd0d7ba14cae3eb0490481
PatchThird Party Advisory
github.com / jupyterhub/nbgitpuller/security/advisories/GHSA-mq5p-2mcr-m52j
Third Party Advisory