{"id":"EUVD-2026-42294","revision":null,"records":[{"revision":"37358b47326a4ecc879f7f0d348f1dd2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-57439","aliases":[],"title":"CyberChef: Prototype pollution in Series Chart operation","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":"2026-07-08T14:58:38.693+00:00","modifiedAt":"2026-07-08T16:12:28.118+00:00","affected":[{"ecosystem":"Vendor product","name":"CyberChef","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"gchq\",\n                    \"product\": \"CyberChef\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 11.2.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","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/security/advisories/GHSA-fx6f-382r-j72c","https://github.com/gchq/CyberChef/issues/2568","https://github.com/gchq/CyberChef/pull/2569","https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f","https://github.com/gchq/CyberChef/releases/tag/v11.2.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57439","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-57439","identifiers":["CVE-2026-57439"]},"retained":false,"historicalAffected":[]},{"revision":"a7973843aea14917ba562c4ed1890c29","observedAt":"2026-11-07T12:38:04.506+00:00","statement":{"source":"euvd","id":"EUVD-2026-42294","aliases":["CVE-2026-57439","GHSA-fx6f-382r-j72c"],"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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":5,"severity":null}],"references":["https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c","https://github.com/gchq/CyberChef/issues/2568","https://github.com/gchq/CyberChef/pull/2569","https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f","https://github.com/gchq/CyberChef/releases/tag/v11.2.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-42294","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 8, 2026, 2:58:38 PM","dateUpdated":"Jul 8, 2026, 4:12:28 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-42294","identifiers":["EUVD-2026-42294","CVE-2026-57439","GHSA-fx6f-382r-j72c"]},"retained":false,"historicalAffected":[]},{"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":[]},{"revision":"e5b247fb2a1542e68e7dd077c66cebc7","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-fx6f-382r-j72c","aliases":["CVE-2026-57439"],"title":"CyberChef: Prototype pollution in Series Chart operation","description":"On 5 June 2026 CyberChef received a security vulnerability report from @hyuunnn detailing a vulnerability in the Series Chart operation, where malicious input could result in prototype pollution of the data structures outputted from the operation.\nOther operations following Series Chart could have their behaviour manipulated by the attacker-controlled prototype, for example, injecting malicious content into their HTML output.\n\nIn this case, a demonstration was provided that chained the Series Chart operation with the Parse UDP operation to cause attacker controlled JavaScript to be executed.\n\n## Details\nWhen the Series Chart operation parses user-supplied CSV, it accepts `__proto__` as a key and uses it to pollute the object.\nThe objToTbale function in src/core/lib/Protocol.mjs, used in a number of IP parsing operations, renders data items within `<td>` tags without escaping.\nThese bugs can be chained to produce an XSS vulnerability.\n\n**Proof of Concept**\n[https://gchq.github.io/CyberChef/#recipe=Series_chart('CRLF','Comma','',1,'')Parse_UDP('Raw')&input=X19wcm90b19fLDxpbWcgc3JjPXggb25lcnJvcj1hbGVydChkb2N1bWVudC5kb21haW4pPiwx](https://gchq.github.io/CyberChef/#recipe=Series_chart('CRLF','Comma','',1,'')Parse_UDP('Raw')&input=X19wcm90b19fLDxpbWcgc3JjPXggb25lcnJvcj1hbGVydChkb2N1bWVudC5kb21haW4pPiwx)\n\nEncoded input data is:\n```\n__proto__,<img src=x onerror=alert(document.domain)>,1\n```\n\n### Impact\nObjects with attacker controlled prototypes could be processed by CyberChef operations. This enabled control of the output of some operations, and in particular, the ability to insert malicious JavaScript into the output of the Parse UDP operation.\n\n### Patches\nThis has been patched in release v11.2.0.\n\n### Workarounds\nNo workarounds are available. Users must upgrade to CyberChef v11.2.0.","state":0,"publishedAt":"2026-09-24T19:24:30+00:00","modifiedAt":"2026-09-24T19:45:04.8230277+00:00","affected":[{"ecosystem":"npm","name":"cyberchef","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"11.2.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c","https://nvd.nist.gov/vuln/detail/CVE-2026-57439","https://github.com/gchq/CyberChef/issues/2568","https://github.com/gchq/CyberChef/pull/2569","https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f","https://github.com/gchq/CyberChef","https://github.com/gchq/CyberChef/releases/tag/v11.2.0"],"sourceUrl":"https://github.com/advisories/GHSA-fx6f-382r-j72c","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-fx6f-382r-j72c","identifiers":["GHSA-fx6f-382r-j72c","CVE-2026-57439"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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