Vulnerability Description
Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions 2.0.0rc2 and above, prior to 3.3.0, the environment variables (KERNEL_XXX) used during the rendering of the Kubernetes manifest are vulnerable to Server Side Template Injection (SSTI). By including Jinja2 template expressions it is possible to execution Python code and OS Commands in the Enterprise Gateway service. The code can use or steal the Kubernetes service account token, which can steal Kubernetes secrets and be used to fully compromise the Kubernetes cluster by scheduling a privileged pod or a pod with a hostPath volume mount. This issue has been fixed in version 3.3.0.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jupyter | Enterprise Gateway | >= 2.1.0, < 3.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/jupyter-server/enterprise_gateway/releases/tag/v3.3.0ProductRelease Notes
- https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-f4ExploitVendor Advisory
- https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-f4ExploitVendor Advisory
FAQ
What is CVE-2026-44181?
CVE-2026-44181 is a vulnerability with a CVSS score of 10.0 (CRITICAL). Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions 2.0.0rc2 and above, prior to 3.3.0, the env...
How severe is CVE-2026-44181?
CVE-2026-44181 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-44181?
Check the references section above for vendor advisories and patch information. Affected products include: Jupyter Enterprise Gateway.