CVE-2026-57439

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CVSS 3.1

5.0 medium

EPSS

<1%p16

Published

Jul 8, 2026 (Jul 8, 2026)

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.

Weakness: CWE-79, CWE-1321
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.2%)

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