CVE-2026-44180Public exploitNetwork attack vector

Root kernel launch via whitespace-padded UID values

Published Jul 16, 2026 · Updated Jul 16, 2026

Improper input validation in Jupyter Enterprise Gateway 2.0.0rc1 and later before 3.3.0 allows remote attackers to launch kernels as root. ContainerProcessProxy._enforce_prohibited_ids compares the raw KERNEL_UID or KERNEL_GID string against prohibited values before a Kubernetes template parses the value as an integer, so trailing whitespace bypasses the check. Access to the kernel-creation API reaches the flaw; escaping the kernel container further requires a writable hostPath mount or another host-access path.

CVSS severity9.8
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Jupyter Enterprise Gateway 2.0.0rc1 and later before 3.3.0 allows remote attackers to launch kernels as root. ContainerProcessProxy._enforce_prohibited_ids compares the raw KERNEL_UID or KERNEL_GID string against prohibited values before a Kubernetes template parses the value as an integer, so trailing whitespace bypasses the check. Access to the kernel-creation API reaches the flaw; escaping the kernel container further requires a writable hostPath mount or another host-access path.

The record

CVE
CVE-2026-44180
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Project Jupyter
Product
Jupyter Enterprise Gateway
Classifications
CWE-20, CWE-180, T1068
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=>= 2.0.0rc1, < 3.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Project Jupyter · Jupyter Enterprise Gatewayversion=>= 2.0.0rc1, < 3.3.0

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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-20Improper Input Validation
CWE-180Incorrect Behavior Order: Validate Before Canonicalize
T1068Exploitation for Privilege Escalation

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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