{"id":"CVE-2026-118248","aliases":["EUVD-2026-112362","GHSA-wg5j-9wp8-2ggm"],"status":"published","title":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","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.","severity":{"version":"4.0","score":6.9,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0028,"percentile":0.20757,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2026-10-28T17:55:47Z","modified":"2026-11-01T02:30:57Z","products":[{"vendor":"@highcharts","product":"dashboards"},{"vendor":"highcharts","product":"highcharts"}],"references":[{"url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118248.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118248","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-118248","title":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","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.","status":"published","published":"2026-10-28T17:55:47.52Z","modified":"2026-10-30T18:21:14.325Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:20:03.827373Z"}],"euvd":[{"id":"EUVD-2026-112362","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.","status":"published","published":"2026-10-28T17:55:47Z","modified":"2026-10-30T18:21:14Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium"}],"updated_at":"2026-11-02T16:59:03.071815Z"}],"nvd":[{"id":"CVE-2026-118248","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.","status":"published","published":"2026-10-28T18:17:15.87Z","modified":"2026-10-30T19:18:18.283Z","cvss":[{"version":"4.0","score":6.9,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-04T18:06:24.696141Z"}],"osv":[{"id":"CVE-2026-118248","title":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","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.","status":"published","published":"2026-10-28T17:55:47.52Z","modified":"2026-11-01T02:30:57.753133969Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:44:57.008854Z"}]}}