Vulnerability Description
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., KERNEL_XXX) into Kubernetes manifests without YAML-aware escaping, enabling YAML injection attacks. Attackers can inject new fields, overwrite critical fields (e.g., duplicate securityContext keys, where the last one prevails), and inject document boundaries (--- for new documents, ... for end-of-document) to generate multiple resources, potentially creating arbitrary types, such as privileged pods. The Jinja2 template for the Kubernetes manifest contains several kernel_xxx variables, such as kernel_working_dir that are used when rendering the manifest and are all vectors for YAML injection. This issue has been fixed in version 3.3.0.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jupyter | Enterprise Gateway | < 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-cfExploitVendor Advisory
- https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-cfExploitVendor Advisory
FAQ
What is CVE-2026-44182?
CVE-2026-44182 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 prior to 3.3.0, the server interpolates unt...
How severe is CVE-2026-44182?
CVE-2026-44182 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-2026-44182?
Check the references section above for vendor advisories and patch information. Affected products include: Jupyter Enterprise Gateway.