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

Medium 5.3 Published 11 Feb 2026 Updated 12 Feb 2026

Attackers can execute arbitrary JavaScript in the Dify web chat interface via malicious ECharts inputs, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-26023?

CVE-2026-26023 is a medium-severity cross-site scripting vulnerability in langgenius dify, published on 11 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-26023?

It affects 1 product.

Products include Dify Dify.

How do I fix CVE-2026-26023?

No fix has been published for CVE-2026-26023 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-26023 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26023 exists.

Sources

Also known as GHSA-qqjx-5h5w-x5vj.