CVE-2026-26023: Client‑side DOM XSS in the web chat app of Dify when using echarts

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-11 · updated 2026-06-17
Weakness: CWE-79

Description

Dify is an open-source LLM app development platform. Prior to 1.13.0, a cross site scripting vulnerability has been found in the web application chat frontend when using echarts. User or llm inputs containing echarts containing a specific javascript payload will be executed. This vulnerability is fixed in 1.13.0.

Affected products

Dify: through 1.11.4

References

https://github.com/langgenius/dify/commit/378a1d7d08bd0ac5c75eaadc075a0f35211fcb8e
https://github.com/langgenius/dify/releases/tag/1.13.0
https://github.com/langgenius/dify/security/advisories/GHSA-qqjx-5h5w-x5vj

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