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CVE-2026-57439

CVE-2026-57439 · CyberChef: Prototype pollution in Series Chart operation

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

CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts __proto__ as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.

CVSS 5.0 · Medium · EPSS 0.1% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • cyberchef

    Versions
    • < 11.2.0: Affected

    No fix published

  • cyberchef npm

    Affected ranges
    • SEMVER: < 11.2.0

    Update to 11.2.0

Original sources

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