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    CVE-2026-54527

    JupyterLab Git is a Git extension for JupyterLab. From 0.30.0b3 before 0.54.0, the PlainTextDiff.ts createHeader() method passes Git filenames directly to innerHTML when rendering renamed files in commit history, allowing a crafted filename to execute JavaScript when a victim views the rename diff in the Git History tab. This issue is fixed in version 0.54.0.

    Published:Jul 8, 2026
    Last Modified:Jul 10, 2026
    EPS:Jul 8, 2026
    EPSS Score:0.00284
    CVSS Score:9.3

    Affected Products

    Vendor
    Jupyter
    Product
    Jupyterlab

    Exploits

    https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-f962-v9hr-pfg5https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-f962-v9hr-pfg5

    Related CVEs

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    CVE-2026-73415 (CVSS 7.5) — jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Noteb…
    CVE-2026-67338 (CVSS 5.1) — JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fai…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High