{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57439","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-24T13:21:20.729Z","datePublished":"2026-07-08T14:58:38.693Z","dateUpdated":"2026-07-08T16:12:28.118Z"},"containers":{"cna":{"title":"CyberChef: Prototype pollution in Series Chart operation","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c"},{"name":"https://github.com/gchq/CyberChef/issues/2568","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/issues/2568"},{"name":"https://github.com/gchq/CyberChef/pull/2569","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/pull/2569"},{"name":"https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f"},{"name":"https://github.com/gchq/CyberChef/releases/tag/v11.2.0","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/releases/tag/v11.2.0"}],"affected":[{"vendor":"gchq","product":"CyberChef","versions":[{"version":"< 11.2.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-08T14:58:38.693Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-fx6f-382r-j72c","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-08T16:12:11.872931Z","id":"CVE-2026-57439","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-08T16:12:28.118Z"}}]}}