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CVE-2026-42266

CVE-2026-42266 · JupyterLab has an Extension Manager API/GUI Policy Discrepancy allowing 3rd party (malicious) extensions install via POST request.

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 8.8 · High · EPSS 5.7% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • jupyterlab

    Versions
    • >= 4.0.0, < 4.5.7: Affected

    No fix published

  • jupyterlab Debian:13

    Versions
    • 4.0.11+ds1+~cs11.25.27-7
    • 4.0.11+ds1+~cs11.25.27-8
    • 4.0.11+ds1+~cs11.25.27-9
    • 4.0.11+ds2+~cs11.25.27-1
    • 4.0.11+ds2+~cs11.25.27-3
    • 4.0.11+ds3+~cs11.25.27-1
    • 4.0.11+ds4+~cs11.25.27-1
    • 4.0.11+ds4+~cs11.25.27-2
    • 4.0.11+ds4+~cs11.25.27-3
    • 4.0.11+ds4+~cs11.25.27-4
    • 4.0.11+ds5+~cs11.25.27-1
    • 4.0.13+ds1+~2.0.1+~cs1.4.4-1
    • 4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8
    • 4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-5
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-6
    • 4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterlab Debian:14

    Versions
    • 4.0.11+ds1+~cs11.25.27-7
    • 4.0.11+ds1+~cs11.25.27-8
    • 4.0.11+ds1+~cs11.25.27-9
    • 4.0.11+ds2+~cs11.25.27-1
    • 4.0.11+ds2+~cs11.25.27-3
    • 4.0.11+ds3+~cs11.25.27-1
    • 4.0.11+ds4+~cs11.25.27-1
    • 4.0.11+ds4+~cs11.25.27-2
    • 4.0.11+ds4+~cs11.25.27-3
    • 4.0.11+ds4+~cs11.25.27-4
    • 4.0.11+ds5+~cs11.25.27-1
    • 4.0.13+ds1+~2.0.1+~cs1.4.4-1
    • 4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7
    • 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8
    • 4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2
    • 4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
    Affected ranges
    • ECOSYSTEM: < 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3

    Update to 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3

  • jupyterlab PyPI

    Versions
    • 4.0.0
    • 4.0.1
    • 4.0.10
    • 4.0.11
    • 4.0.12
    • 4.0.13
    • 4.0.2
    • 4.0.3
    • 4.0.4
    • 4.0.5
    • 4.0.6
    • 4.0.7
    • 4.0.8
    • 4.0.9
    • 4.1.0
    • 4.1.0a1
    • 4.1.0a2
    • 4.1.0a3
    • 4.1.0a4
    • 4.1.0b0
    • 4.1.0b1
    • 4.1.0b2
    • 4.1.0rc0
    • 4.1.0rc1
    • 4.1.1
    • 4.1.2
    • 4.1.3
    • 4.1.4
    • 4.1.5
    • 4.1.6
    • 4.1.7
    • 4.1.8
    • 4.2.0
    • 4.2.0a0
    • 4.2.0a1
    • 4.2.0a2
    • 4.2.0b0
    • 4.2.0b1
    • 4.2.0b2
    • 4.2.0b3
    • 4.2.0rc0
    • 4.2.1
    • 4.2.2
    • 4.2.3
    • 4.2.4
    • 4.2.5
    • 4.2.6
    • 4.2.7
    • 4.3.0
    • 4.3.0a0
    • 4.3.0a1
    • 4.3.0a2
    • 4.3.0b0
    • 4.3.0b1
    • 4.3.0b2
    • 4.3.0b3
    • 4.3.0rc0
    • 4.3.0rc1
    • 4.3.1
    • 4.3.2
    • 4.3.3
    • 4.3.4
    • 4.3.5
    • 4.3.6
    • 4.3.7
    • 4.3.8
    • 4.4.0
    • 4.4.0a0
    • 4.4.0a1
    • 4.4.0a2
    • 4.4.0a3
    • 4.4.0b0
    • 4.4.0b1
    • 4.4.0b2
    • 4.4.0rc0
    • 4.4.0rc1
    • 4.4.1
    • 4.4.10
    • 4.4.2
    • 4.4.3
    • 4.4.4
    • 4.4.5
    • 4.4.6
    • 4.4.7
    • 4.4.8
    • 4.4.9
    • 4.5.0
    • 4.5.0a0
    • 4.5.0a1
    • 4.5.0a2
    • 4.5.0a3
    • 4.5.0a4
    • 4.5.0b0
    • 4.5.0b1
    • 4.5.0rc0
    • 4.5.0rc1
    • 4.5.1
    • 4.5.2
    • 4.5.3
    • 4.5.4
    • 4.5.5
    • 4.5.6
    Affected ranges
    • ECOSYSTEM: ≥ 4.0.0, < 4.5.7

    Update to 4.5.7

  • jupyterlab Ubuntu:25.10

    Versions
    • 4.0.11+ds1+~cs11.25.27-5
    • 4.0.11+ds1+~cs11.25.27-6
    • 4.0.11+ds1+~cs11.25.27-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterlab Ubuntu:26.10

    Versions
    • 4.0.11+ds1+~cs11.25.27-9
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterlab Ubuntu:26.04:LTS

    Versions
    • 4.0.11+ds1+~cs11.25.27-7
    • 4.0.11+ds1+~cs11.25.27-8
    • 4.0.11+ds1+~cs11.25.27-9
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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