CVE-2026-57439

MediumCVSS 5.0/10Last modified Jul 10, 2026

Description

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.

Metrics

CVSS 3.1 5.0/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79 CWE-1321

Affected software

No affected versions have been published.

Timeline

Published: Jul 8, 2026
Last modified: Jul 10, 2026
NVD status: Deferred

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