{"answers":{"affected":"2 open source packages ship an affected version, including highcharts.","exploited":"There is no known exploitation of CVE-2026-118249 in the wild and no public exploit code.","fix":"Upgrade highcharts to 13.1.0 or later.","what":"CVE-2026-118249 is a high-severity vulnerability in highcharts, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118249 and fix it if it is affected.\n\nWhat it is: CVE-2026-118249 is a high-severity vulnerability in highcharts, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118249 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- highcharts (npm): affected from 13.0.0; fixed in 13.1.0\n- highcharts (npm): affected from 13.0.0; fixed in 13.1.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-118249/ (Markdown: https://insights.sbomify.com/CVE-2026-118249/index.md)","id":"CVE-2026-118249","markdown":"https://insights.sbomify.com/CVE-2026-118249/index.md","name":"CVE-2026-118249","record":{"aliases":["GHSA-gfvx-2c2g-38wq"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L","version":"4.0"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"Highcharts JS is a JavaScript charting library based on SVG. From 13.0.0 until 13.1.0, Highcharts builds series data columns by using point option keys directly as column IDs. Own enumerable __proto__ and constructor keys from parsed point objects can therefore direct integer-indexed writes to Object.prototype or the Object constructor. The inherited values affect reads and for-in enumeration across the page and can disrupt rendering or alter consuming application behavior without user interaction beyond rendering the chart. This issue is fixed in 13.1.0.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Highcharts: series column construction writes to Object.prototype","id":"CVE-2026-118249","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Highcharts: dotted series.keys paths write to Object.prototype","id":"CVE-2026-118250"},"packages":[{"ecosystem":"npm","fixed":["13.1.0"],"introduced":["13.0.0"],"last_affected":[],"package":"highcharts","purl":null,"source":"GHSA-gfvx-2c2g-38wq"},{"ecosystem":"npm","fixed":["13.1.0"],"introduced":["13.0.0"],"last_affected":[],"package":"highcharts","purl":"pkg:npm/highcharts","source":"GHSA-gfvx-2c2g-38wq"}],"prev":{"headline":"Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype","id":"CVE-2026-118248"},"products":["highcharts"],"published":"2026-10-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["highcharts"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-118249/"}