Vulnerability Description
A cross-site scripting (XSS) vulnerability exists in Apache ECharts in the Lines series tooltip rendering logic. This issue affects Apache ECharts: from before 6.1.0. In versions prior to 6.1.0, if both Lines series and tooltip are used, and no user-specified tooltip.formatter is provided, and series.data[i].name is specified, raw HTML string series.data[i].name can be rendered through innerHTML sink into tooltip content. Although tooltip is allowed to accept user-provided raw HTML via a custom tooltip.formatter, the built-in tooltip formatters conventionally perform HTML escaping automatically. This case breaks that convention and may unexpectedly lead to script execution when tooltips are displayed. Users are recommended to upgrade to version 6.1.0 if using the Lines series in this way, which fixes the issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Echarts | < 6.1.0 |
Related Weaknesses (CWE)
References
- https://echarts.apache.org/en/option.html#series-linesProduct
- https://echarts.apache.org/handbook/en/best-practices/security/#passing_raw_htmlProduct
- https://github.com/apache/echarts/pull/21608Issue TrackingPatch
- https://lists.apache.org/thread/1g6xk7gd9vg1c6zyqqt2lnko10zomc3oMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/23/4Mailing ListThird Party Advisory
FAQ
What is CVE-2026-45249?
CVE-2026-45249 is a vulnerability with a CVSS score of 6.1 (MEDIUM). A cross-site scripting (XSS) vulnerability exists in Apache ECharts in the Lines series tooltip rendering logic. This issue affects Apache ECharts: from before 6.1.0. In versions prior to 6.1.0, ...
How severe is CVE-2026-45249?
CVE-2026-45249 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45249?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Echarts.