Detections
Analytics
CVE-2026-57439
medium
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.
References
https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c
https://github.com/gchq/CyberChef/releases/tag/v11.2.0
https://github.com/gchq/CyberChef/pull/2569
https://github.com/gchq/CyberChef/issues/2568
https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f