TI-2026-32161 Aliases CVE-2026-44182 GHSA-cfw7-6c5v-2wjq

Jupyter Enterprise Gateway Has Kubernetes Manifest Injection via Jinja2 Template Rendering

HIGH 82CWE-74Published 2026-07-16 · Updated 2026-07-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00632 50th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed enterprise_gateway (jupyter-server): 3.3.0jupyter_enterprise_gateway (PyPI): 3.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
jupyterlab	enterprise_gateway	before 3.3.0	3.3.0	Patch available	CNA
—	jupyter_enterprise_gateway (PyPI)	before 3.3.0	3.3.0	Patch available	GHSA-cfw7-6c5v-2wjq

enterprise_gateway Vendorjupyterlab Affected before 3.3.0 Fixed in 3.3.0 Patch available CNA
jupyter_enterprise_gateway (PyPI) Vendor— Affected before 3.3.0 Fixed in 3.3.0 Patch available GHSA-cfw7-6c5v-2wjq

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:jupyter:enterprise_gateway::::::::	before 3.3.0	Vulnerable	jupyterlab

cpe:2.3:a:jupyter:enterprise_gateway:*:*:*:*:*:*:*:* Versions before 3.3.0 Vulnerable ·jupyterlab

Remediation

Fix · CNA enterprise_gateway (jupyter-server) Fixed in 3.3.0
Fix · GHSA-cfw7-6c5v-2wjq jupyter_enterprise_gateway (PyPI) Fixed in 3.3.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-44182
2026-10-03 Alias added: GHSA-cfw7-6c5v-2wjq
2026-10-26 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-cfw7-6c5v-2wjq

Other 2

TI-2026-32160 Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection results in Remote Code Execution CVSS 4.0CRITICAL 10.0
TI-2026-32159 Jupyter Enterprise Gateway: ContainerProcessProxy._enforce_prohibited_ids can be Bypassed CVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences