CVE-2026-85021 langgenius dify Splash Layout splash.tsx router.replace cross site scripting
Remote attackers can execute arbitrary scripts via the redirect_url parameter in the Splash Layout component of the Dify web application.
- 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-2026-85021?
CVE-2026-85021 is a medium-severity cross-site scripting vulnerability in langgenius dify, published on 3 Sep 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
A vulnerability was determined in langgenius dify 1.13.0. Affected is the function router.replace of the file web/app/(shareLayout)/components/splash.tsx of the component Splash Layout. This manipulation of the argument redirect_url causes cross site scripting. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-85021?
How do I fix CVE-2026-85021?
No fix has been published for CVE-2026-85021 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-2026-85021 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85021 exists.
Sources
Also known as GHSA-7qgm-pqv4-668x, GHSA-mf5r-rpc2-6jqp.