CVE-2026-6600 langflow-ai langflow Frontend React Component Rendering edit-message.tsx cross site scripting
Remote attackers can execute cross-site scripting attacks via the frontend edit-message component, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-6600?
CVE-2026-6600 is a medium-severity cross-site scripting vulnerability in langflow-ai langflow, published on 20 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A flaw has been found in langflow-ai langflow up to 1.8.3. This affects an unknown function of the file src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit-message.tsx of the component Frontend React Component Rendering. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-6600?
How do I fix CVE-2026-6600?
No fix has been published for CVE-2026-6600 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-2026-6600 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6600 exists.
Sources
Also known as GHSA-mxmx-pwg2-cg2h.