CVE-2026-44182Public exploitNetwork attack vector

Cluster compromise via Kubernetes manifest injection

Published Jul 16, 2026 · Updated Jul 16, 2026

YAML injection in Jupyter Enterprise Gateway before 3.3.0 allows remote attackers to create arbitrary Kubernetes resources via kernel requests. The Kubernetes kernel launcher's Jinja2 template inserts KERNEL_XXX-derived values without YAML-aware escaping, so duplicate keys and document boundaries alter the manifest. Exploitation requires a Kubernetes-backed gateway with a reachable kernel API and can create privileged pods or other resources under the gateway's cluster permissions.

CVSS severity10.0
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

YAML injection in Jupyter Enterprise Gateway before 3.3.0 allows remote attackers to create arbitrary Kubernetes resources via kernel requests. The Kubernetes kernel launcher's Jinja2 template inserts KERNEL_XXX-derived values without YAML-aware escaping, so duplicate keys and document boundaries alter the manifest. Exploitation requires a Kubernetes-backed gateway with a reachable kernel API and can create privileged pods or other resources under the gateway's cluster permissions.

The record

CVE
CVE-2026-44182
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Project Jupyter
Product
Jupyter Enterprise Gateway
Classifications
CWE-74, T1611, T1610
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

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Is a vulnerable build present?

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

  1. Affected versionversion=< 3.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Project Jupyter · Jupyter Enterprise Gatewayversion=< 3.3.0

Published CVSS scores

10.0GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
10.0NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A: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-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1611Escape to Host
T1610Deploy Container

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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