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CVE-2026-44181

Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection results in Remote Code Execution

Published: Jul 16, 2026Updated: Aug 5, 2026 Sources: CVE List NVDCWE-1336
10.0CRITICAL
NVD MITRE
EPSS Score
0.7%
Top 49.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-1336

Affected Products

jupyter
oss-projectaka notebook, jupyter server, jupyterlab
enterprise gatewayMixed
AI / ML / notebook-mlops
jupyter-server
oss-project·USaka jupyter_server, jupyter-scheduler
enterprise_gatewayOn-prem
AI / ML / notebook-mlops

Exploitability

Official Patch Available
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References

https://github.com/jupyter-server/enterprise_gateway/releases/tag/v3.3.0
github.com
https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-f49j-v924-fx9w
github.com
News mentions
1

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