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CVE-2026-44182

Jupyter Enterprise Gateway Has Kubernetes Manifest Injection via Jinja2 Template Rendering

Published: Jul 16, 2026Updated: Aug 5, 2026 Sources: CVE List NVDCWE-74
10.0CRITICAL
NVD MITRE
EPSS Score
0.5%
Top 59.1%
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 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.

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-74

Affected Products

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

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

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-cfw7-6c5v-2wjq
github.com
News mentions
1

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