{"id":"CVE-2026-41518","summary":"Chartbrew has a stored DOM XSS via Chart Tooltip innerHTML (ChartDatasetConfig.legend)","details":"Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. In versions 4.9.0 through 5.0.0, an authenticated user with project-editor permissions can store arbitrary HTML/JavaScript in the `ChartDatasetConfig.legend` field. The payload is persisted verbatim in the database, propagated through the Chart.js rendering pipeline, and injected into the tooltip DOM element via an unguarded `innerHTML` assignment in `ChartTooltip.js`. Every unauthenticated viewer of the public dashboard triggers JavaScript execution on page load — no hover interaction is required. Browser-based Playwright verification confirmed `alert('localhost')` fires immediately and `\u003cimg src=\"x\" onerror=\"alert(document.domain)\"\u003e` is present in the `#chartjs-tooltip` DOM element. Version 5.0.1 contains a fix.","aliases":["GHSA-6q2j-365c-7gqf"],"modified":"2026-07-15T01:48:49.871665405Z","published":"2026-06-04T19:28:55.627Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41518.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41518.json"},{"type":"ADVISORY","url":"https://github.com/chartbrew/chartbrew/security/advisories/GHSA-6q2j-365c-7gqf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41518"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/chartbrew/chartbrew","events":[{"introduced":"7cf1713c5a14d36cf88f4e5f467ddc74d7c6f600"},{"fixed":"247661f935459ecb950f4addb7287f1b99d659e1"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"4.9.0"},{"fixed":"5.0.1"},{"fixed":"5.0.0"}]}}],"versions":["v5.0.0","v4.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41518.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N"}]}