CVE-2026-44180: Jupyter Enterprise Gateway vulnerability (CVSS 9.8)

Description

Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. Versions 2.0.0rc1 and above prior to 3.3.0 have a prohibited UID and GID feature that by default prevents launching kernels with UID or GID 0 (root), and this restriction can be bypassed using a specially crafted KERNEL_UID or KERNEL_GID value. This input validation vulnerability allows running Jupyter kernels as root, which can be dangerous as it allows more attack surface, and may lead to container escapes, compromising the worker node and all workloads running on it. Repeated exploitation can compromise all worker nodes, and thus the entire Kubernetes cluster. It is possible to specify volume mounts, so one vector for a container escape is to use a hostPath R/W volume mount, use this UID/GID bypass to run as root, and then gain code execution in the underlying worker node by creating a crontab entry in the mounted host file system. This issue has been fixed in version 3.0.0.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Jupyter Enterprise Gateway≥ 2.1.0 < 3.3.0 · 2.0.0

Remediation

Fixed in

Jupyter Enterprise Gateway≥ 3.3.0

Patch & vendor advisories

https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-chq7-94j8-cj28

References

https://github.com/jupyter-server/enterprise_gateway/releases/tag/v3.3.0ProductRelease Notes
https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-chq7-94j8-cj28ExploitVendor Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-44180 being actively exploited?

CVE-2026-44180 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.71%.

How severe is CVE-2026-44180?

CVE-2026-44180 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.71% probability of exploitation.

Which products are affected by CVE-2026-44180?

Affected products include Jupyter Enterprise Gateway.

How do I fix CVE-2026-44180?

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

Secuno correlates vulnerabilities like CVE-2026-44180 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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