{"id":"CVE-2026-118248","aliases":[],"cve":{"records":[{"id":"CVE-2026-118248","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-27T20:13:55.313Z","published":"2026-10-28T17:55:47.520Z","modified":"2026-10-30T18:21:14.325Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-28T17:55:47.520Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T18:21:14.325Z"}],"references":[{"url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","source":"GitHub_M"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T18:21:05.324040Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"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4.2.2.","score":6.9,"severity":"medium","published":"2026-10-28T17:55:47.520Z","modified":"2026-10-30T18:21:14.325Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"highcharts","name":"highcharts","platforms":[],"versions":[{"version":"< 13.1.0","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-118248"},{"vendor":"@highcharts","name":"dashboards","platforms":[],"versions":[{"version":">= 1.0.0, < 4.2.2","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-118248"}],"remediation":[],"references":["https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm","https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b","https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2"],"sources":[{"name":"CVE","id":"CVE-2026-118248","modified":"2026-10-30T18:21:14.325Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-118248"}],"assessments":[{"source":"GitHub_M","vector":"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","score":6.9}],"sourceAffected":[],"observedAt":"2026-10-30T18:59:51.817Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T06:55:30.992Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"Highcharts Dashboards versions 1.0.0 to 4.2.2 are vulnerable to prototype pollution, allowing an attacker controlling editableOptions to write to Object.prototype. This can have consequences determined by the consuming application. An attacker needs control over editableOptions.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T08:53:43.290Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-118248"}]}}