CVE-2026-44182 Jupyter Enterprise Gateway Has Kubernetes Manifest Injection via Jinja2 Template Rendering

Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions prior to 3.3.0, the server interpolates untrusted environment variables e.g., KERNELXXX into Kubernetes manifests without YAML-aware escapin...

PYSEC-2026-362 Jupyter Enterprise Gateway: Kubernetes Manifest Injection in Jinja2 Template Rendering

Summary The environment variables used during the rendering of the Kubernetes manifest allow YAML injection, enabling attackers to overwrite existing keys like securityContext and inject multi-document YAML to create additional unintended Kubernetes resources. Details The server interpolates...