{"schema":"threatline.record/2","record":{"id":"CVE-2026-118248","aliases":["GHSA-wg5j-9wp8-2ggm"],"summary":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","details":"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.","categories":["Unclassified"],"product":"highcharts","vendor":"highcharts","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118248","source_modified_at":"2026-10-28T17:55:47.520Z","fetched_at":"2026-10-28T20:58:01.013507Z","product":"highcharts","vendor":"highcharts","versions":[{"version":"< 13.1.0","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118248","source_modified_at":"2026-10-28T17:55:47.520Z","fetched_at":"2026-10-28T20:58:01.013507Z","product":"dashboards","vendor":"@highcharts","versions":[{"version":">= 1.0.0, < 4.2.2","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T17:55:47.520Z","modified_at":"2026-10-28T17:55:47.520Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-118248","fetched_at":"2026-10-28T20:58:01.013507Z","source_modified_at":"2026-10-28T17:55:47.520Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-28T17:55:47.520Z","content_hash":"a48aa789d0db319721aa53464e306f03976041087f99935281f9575adddee35a"}}