CVE-2026-44182 (GCVE-0-2026-44182)
Vulnerability from cvelistv5 – Published: 2026-07-16 22:05 – Updated: 2026-07-17 15:04
VLAI
EPSS
VEX
Title
Jupyter Enterprise Gateway Has Kubernetes Manifest Injection via Jinja2 Template Rendering
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 15:04 UTC
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jupyter-server/enterprise_gate… | x_refsource_CONFIRM |
| https://github.com/jupyter-server/enterprise_gate… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| jupyter-server | enterprise_gateway |
Affected:
< 3.3.0
|
guessed |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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