CVE-2026-44181Public exploitNetwork attack vector

Unauthenticated code execution via Jinja2 manifest rendering

Published Jul 16, 2026 · Updated Jul 16, 2026

Server-side template injection in Jupyter Enterprise Gateway 2.0.0rc2 through 3.2.3 allows remote attackers to execute arbitrary code. The Kubernetes process proxy renders attacker-controlled KERNEL_POD_NAME and other KERNEL_* values as Jinja2 expressions while building a manifest. Exploitation requires network access to the kernel-creation API and a Kubernetes kernelspec; service-account permissions bound the resulting cluster impact.

CVSS severity10.0
Critical
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Jupyter Enterprise Gateway 2.0.0rc2 through 3.2.3 allows remote attackers to execute arbitrary code. The Kubernetes process proxy renders attacker-controlled KERNEL_POD_NAME and other KERNEL_* values as Jinja2 expressions while building a manifest. Exploitation requires network access to the kernel-creation API and a Kubernetes kernelspec; service-account permissions bound the resulting cluster impact.

The record

CVE
CVE-2026-44181
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Project Jupyter
Product
Jupyter Enterprise Gateway
Classifications
CWE-1336, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0.0rc2, < 3.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Project Jupyter · Jupyter Enterprise Gatewayversion=>= 2.0.0rc2, < 3.3.0

Published CVSS scores

10.0GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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