CVE-2026-44181: Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Sp

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CRITICAL 10.0REMOTEWATCHLISTUPGRADE

CVE-2026-44181 is a critical-severity flaw (CVSS 10.0) affecting enterprise gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions 2.0.0rc2 and above, prior to 3.3.0, the environment variables (KERNEL_XXX) used during the rendering of the Kubernetes manifest are vulnerable to Server Side Template Injection (SSTI). By including Jinja2 template expressions it is possible to execution Python code and OS Commands in the Ente

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-1336
Published	2026-07-16
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: jupyter

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 23:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

jupyter enterprise gateway UPGRADE

Affected: >= 2.1.0 and < 3.3.0 · 2.0.0 · 2.0.0 rc2

Fixed in: 3.3.0

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy enterprise-gateway || rpm -q enterprise-gateway || enterprise-gateway --version

2. UPGRADE to 3.3.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade enterprise-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade enterprise-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison enterprise-gateway sudo apt install enterprise-gateway=<VERSION_BEFORE_2.0.0> sudo apt-mark hold enterprise-gateway

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list enterprise-gateway sudo dnf downgrade enterprise-gateway-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add enterprise-gateway

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Python (pip) · jupyter_enterprise_gateway · FIXED · 3.3.0 · vulnerable: >= 2.0.0rc2, < 3.3.0 · source

pip install --upgrade "jupyter_enterprise_gateway>=3.3.0" pip show jupyter_enterprise_gateway

Fedora 46 · conda · FIXED · 26.9.4-2.fc46 · FEDORA-2026-09931756f1 · source

sudo dnf upgrade --advisory=FEDORA-2026-09931756f1

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-f49j-v924-fx9w

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44181?

enterprise gateway: upgrade to 3.3.0. Exact commands for each OS are on this page.

Is CVE-2026-44181 being exploited?

CVE-2026-44181 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44181 affect?

CVE-2026-44181 affects enterprise gateway. Severity is critical (CVSS 10.0). Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions 2.0.0rc2 and above, prior to 3.3.0, the environment variables (KERNEL_XXX) used dur

How urgent is CVE-2026-44181?

Priority 67/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Python vulnerabilities · Docker vulnerabilities · Kubernetes vulnerabilities · Jupyter vulnerabilities · Apache Spark vulnerabilities

Related CVEs

CVE-2026-44180 CRITICAL 9.8 UPGRADE Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Sp
CVE-2026-44182 CRITICAL 10.0 UPGRADE Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Sp

References

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