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CVE-2026-44181— Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection results in Remote Code Execution

Quick assessment

Affected
jupyter-server enterprise_gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jupyter Enterprise Gateway是Jupyter组织的一款网络设备产品。 Jupyter Enterprise Gateway 2.0.0rc2至3.3.0之前版本存在代码注入漏洞，该漏洞源于在渲染Kubernetes manifest时使用的环境变量（KERNEL_XXX）容易受到服务器端模板注入（SSTI）攻击，可能导致执行Python代码和OS命令。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.70% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
jupyter-server enterprise_gateway >= 2.0.0rc2, < 3.3.0 affected
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I. Basic Information for CVE-2026-44181

Vulnerability Information
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Vulnerability Title
Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection results in Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
Jupyter Enterprise Gateway 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jupyter Enterprise Gateway是Jupyter组织的一款网络设备产品。 Jupyter Enterprise Gateway 2.0.0rc2至3.3.0之前版本存在代码注入漏洞，该漏洞源于在渲染Kubernetes manifest时使用的环境变量（KERNEL_XXX）容易受到服务器端模板注入（SSTI）攻击，可能导致执行Python代码和OS命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jupyter-server enterprise_gateway >= 2.0.0rc2, < 3.3.0 -

II. Public POCs for CVE-2026-44181

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III. Intelligence Information for CVE-2026-44181

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Vendor Advisories for CVE-2026-44181 (1)

Vendor Pages for CVE-2026-44181 (1)

Same Patch Batch · jupyter-server · 2026-07-16 · 3 CVEs total

CVE-2026-44180 9.8 CRITICAL Jupyter Enterprise Gateway: ContainerProcessProxy._enforce_prohibited_ids can be Bypassed
CVE-2026-44182 Jupyter Enterprise Gateway Has Kubernetes Manifest Injection via Jinja2 Template Rendering

IV. Related Vulnerabilities

Same product: enterprise_gateway
Same vendor: jupyter-server
Same weakness: CWE-1336

V. Comments for CVE-2026-44181

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