How severe is CVE-2026-45249?

CVE-2026-45249 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-45249 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45249?

CVE-2026-45249 affects Apache Echarts. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45249?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45249 have an EU (EUVD) identifier?

Yes. CVE-2026-45249 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31650.

When was CVE-2026-45249 published?

CVE-2026-45249 was published on 2026-05-25 and last updated on 2026-06-17.

CVE-2026-45249

CVE-2026-45249 is a medium-severity vulnerability in Apache Echarts with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31650
Weakness: CWE-79
Affected product: Apache Echarts
Published: 2026-05-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-45249?: 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.
How severe is CVE-2026-45249?: CVE-2026-45249 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-45249 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45249?: CVE-2026-45249 affects Apache Echarts. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45249?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45249 have an EU (EUVD) identifier?: Yes. CVE-2026-45249 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31650.
When was CVE-2026-45249 published?: CVE-2026-45249 was published on 2026-05-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:echarts:*:*:*:*:*:*:*:*

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