CVE-2026-44181
CriticalCVSS 10.0Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
Jupyter Enterprise Gateway versions 2.0.0rc2 through 3.3.0 are vulnerable to Server Side Template Injection (SSTI) via KERNEL_XXX environment variables used during Kubernetes manifest rendering. Attackers can execute Python code and OS commands within the Enterprise Gateway service.
Risk Assessment
The risk includes theft of the Kubernetes service account token, which can lead to stealing secrets and full compromise of the Kubernetes cluster by scheduling a privileged pod or a pod with a hostPath volume mount.
Recommendation
Immediately upgrade Jupyter Enterprise Gateway to version 3.3.0 or later, which contains the fix for this SSTI vulnerability.
Original NVD description (English source)
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.