{"id":"CVE-2026-57439","revision":"ee53d4ff787a40a283642f6b8f4638dd","records":[{"revision":"ee53d4ff787a40a283642f6b8f4638dd","observedAt":"2026-10-27T15:15:28.354+00:00","statement":{"source":"nvd","id":"CVE-2026-57439","aliases":[],"title":"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 o…","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.","state":0,"publishedAt":"2026-07-08T16:16:31.28+00:00","modifiedAt":"2026-10-25T20:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":5,"severity":"MEDIUM"}],"references":["https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f","https://github.com/gchq/CyberChef/issues/2568","https://github.com/gchq/CyberChef/pull/2569","https://github.com/gchq/CyberChef/releases/tag/v11.2.0","https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-57439","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-79","CWE-1321"],"productCriteria":[],"sourceDates":{"published":"2026-07-08T16:16:31.280","lastModified":"2026-10-25T20:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-57439","identifiers":["CVE-2026-57439"]},"retained":false,"historicalAffected":[]}],"coverage":[]}