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CVE-2026-44181

CRITICAL
10.0
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-44181
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-05 14:39 UTC
Published
2026-07-16 22:03 UTC
Last updated
2026-07-16 22:03 UTC
Primary CWE
CWE-1336
CWE-1336: Improper Neutralization of Special Elements Used i…
Vendor / Product
jupyter-server / enterprise_gateway
Sources
cve.org  ·  NVD

Severity & Metrics

10.0 CRITICAL CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products (1)
VendorProductPlatformVersions
jupyter-server enterprise_gateway — >= 2.0.0rc2, < 3.3.0
Weakness (CWE)
CWESourceDescription
CWE-1336 cna CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine
CVSS scores (1)
ScoreSeverityVersionSourceVector
10.0 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
References (2)
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