Chartbrew up to 5.0.0 Public Dashboard Chart.js ChartDatasetConfig.legend cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in Chartbrew up to 5.0.0. Affected by this vulnerability is an unknown functionality of the file Chart.js of the component Public Dashboard Handler. The manipulation of the argument ChartDatasetConfig.legend results in cross site scripting. This vulnerability is reported as CVE-2026-41518. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Chartbrew up to 5.0.0. It has been classified as problematic. Affected is some unknown functionality of the file Chart.js of the component Public Dashboard Handler. The manipulation of the argument ChartDatasetConfig.legend with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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 `` is present in the `#chartjs-tooltip` DOM element. Version 5.0.1 contains a fix.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-41518 since 04/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 5.0.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Chartbrew

Version

• 5.0

Website

• Product: https://github.com/chartbrew/chartbrew/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion