CVE-2021-39160
9.6 · CRITICALOverview
CVE-2021-39160 is a critical-severity vulnerability affecting jupyterhub nbgitpuller. It was published on August 25, 2021 and has a CVSS 3.1 base score of 9.6 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
nbgitpuller is a Jupyter server extension to sync a git repository one-way to a local path. Due to unsanitized input, visiting maliciously crafted links could result in arbitrary code execution in the user environment. This has been resolved in version 0.10.2 and all users are advised to upgrade. No work around exist for users who can not upgrade.
Remediation
Check the references section for vendor advisories and patches from jupyterhub. Update nbgitpuller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| jupyterhub | nbgitpuller | >= 0.9.0, < 0.10.2 | Affected |
References
Frequently Asked Questions
What is CVE-2021-39160?
CVE-2021-39160 is a critical-severity vulnerability affecting jupyterhub nbgitpuller. It was published on August 25, 2021 and has a CVSS 3.1 base score of 9.6 (CRITICAL).
How severe is CVE-2021-39160?
This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-39160?
Check the references section for vendor advisories and patches from jupyterhub. Update nbgitpuller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-39160?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-39160 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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