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Enterprise GatewayApplication · Jupyter

CVE-2026-44180

CRITICAL · 9.8 CVSS v3.1 Developing Published 2026-07-16
Fix available
A fix is available. Upgrade to 3.3.0 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click 5 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-07-30.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Enterprise GatewayApplication
Affected:>= 2.1.0, < 3.3.0= 2.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.3.0 or later
Fixed in 3.3.0
Recommended fix Moderate confidence

Jupyter Enterprise Gateway version 3.0.0 or later (3.1.0, 3.2.0, or 3.3.0+)

  1. 1. Identify the currently installed Jupyter Enterprise Gateway version using `jupyter enterpisegateway --version` or checking your deployment manifests
  2. 2. Plan for upgrade during a maintenance window as this is a critical infrastructure component
  3. 3. Upgrade Jupyter Enterprise Gateway to version 3.0.0 or later (version 3.1.0, 3.2.0, or 3.3.0+ are all valid fixed releases)
  4. 4. If using Helm: run `helm upgrade` with the new version chart
  5. 5. If using Kubernetes manifests: update the image tag to the fixed version (e.g., `jupyterhub/enterprise-gateway:3.3.0`)
  6. 6. After upgrade, verify the fix by testing that the prohibited UID/GID bypass vulnerability is no longer exploitable - attempts to use specially crafted KERNEL_UID=0 or KERNEL_GID=0 values should be rejected
  7. 7. Review kernel launch configurations to ensure no unintended volume mounts to hostPath are present
Caveat Minor: Review any custom kernel configurations that may rely on specific UID/GID behavior; the upgrade should be low-risk as it fixes a security vulnerability

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $2,300. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-44180 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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