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CVE-2026-42266

Estado: ModificadaAlta (8.8)—

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.0.0 to 4.5.6, the allow-list of extensions that can be installed from PyPI Extension Manager (allowed_extensions_uris) is not correctly enforced by JupyterLab. The PyPI Extension Manager was not contained to packages listed on the default PyPI index. This vulnerability is fixed in 4.5.7.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad remota (AV:N, PR:L) en JupyterLab que permite instalar extensiones no autorizadas desde PyPI, permitiendo ejecución de código arbitrario y comprometer credenciales o datos del usuario mediante extensiones maliciosas.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementNetwork SegmentationDisable or Remove Feature or ProgramApplication Developer GuidanceActive Directory ConfigurationVulnerability Scanning

Tecnologías afectadas (1)

Jupyter — Jupyterlab

CWE

Referencias

JSON original (NVD)

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{
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          "options": [
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              "automatable": "no"
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  "references": [
    {
      "url": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7",
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  "vulnStatus": "Modified",
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      "description": [
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