{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118248","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-27T20:13:55.313Z","datePublished":"2026-10-28T17:55:47.520Z","dateUpdated":"2026-10-30T18:21:14.325Z"},"containers":{"cna":{"title":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"LOW","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:H/SC:L/SI:L/SA:L","version":"4.0"}}],"references":[{"name":"https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm"},{"name":"https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b","tags":["x_refsource_MISC"],"url":"https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b"},{"name":"https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2","tags":["x_refsource_MISC"],"url":"https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2"}],"affected":[{"vendor":"highcharts","product":"highcharts","versions":[{"version":"< 13.1.0","status":"affected"}]},{"vendor":"@highcharts","product":"dashboards","versions":[{"version":">= 1.0.0, < 4.2.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-28T17:55:47.520Z"},"descriptions":[{"lang":"en","value":"Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible to JavaScript throughout the page, with consequences determined by the consuming application. This issue is fixed in 4.2.2."}],"source":{"advisory":"GHSA-wg5j-9wp8-2ggm","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T18:21:05.324040Z","id":"CVE-2026-118248","options":[{"Exploitation":"none"},{"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":"2026-10-30T18:21:14.325Z"}}]}}