CVE-2026-41518
Chartbrew has a stored DOM XSS via Chart Tooltip innerHTML (ChartDatasetConfig.legend)
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 <img src="x" onerror="alert(document.domain)"> is present in the #chartjs-tooltip DOM element. Version 5.0.1 contains a fix.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Chartbrew has a stored DOM XSS via Chart Tooltip innerHTML (ChartDatasetConfig.legend)
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 <img src="x" onerror="alert(document.domain)"> is present in the #chartjs-tooltip DOM element. Version 5.0.1 contains a fix.
- Record
CVE-2026-41518- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2026-34319
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 <img src="x" onerror="alert(document.domain)"> is present in the #chartjs-tooltip DOM element. Version 5.0.1 contains a fix.
- Record
EUVD-2026-34319- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N - Updated
- 2026-11-02
NVD
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 <img src="x" onerror="alert(document.domain)"> is present in the #chartjs-tooltip DOM element. Version 5.0.1 contains a fix.
- Record
CVE-2026-41518- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Chartbrew has a stored DOM XSS via Chart Tooltip innerHTML (ChartDatasetConfig.legend)
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 <img src="x" onerror="alert(document.domain)"> is present in the #chartjs-tooltip DOM element. Version 5.0.1 contains a fix.
- Record
CVE-2026-41518- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-41518 is a high vulnerability (CVSS 7.6) in Chartbrew, published June 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. No source names a fixed version.