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CVE-2026-44182

Jupyter Enterprise Gateway injection

10.0 CRITICALPublic exploitEPSS 0.63%
  1. Published16 Jul 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Jupyter Enterprise Gateway< 3.3.0

Remediation

Fixed in
Jupyter Enterprise Gateway≥ 3.3.0

References

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Frequently asked

Is CVE-2026-44182 being actively exploited?

CVE-2026-44182 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.63%.

How severe is CVE-2026-44182?

CVE-2026-44182 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.63% probability of exploitation.

Which products are affected by CVE-2026-44182?

Affected products include Jupyter Enterprise Gateway.

How do I fix CVE-2026-44182?

Upgrade affected software to a fixed version, for example Jupyter Enterprise Gateway 3.3.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.