CVE-2026-1721 | Cloudflare Agents up to 0.3.9 server.ts error_description cross site scripting
A vulnerability classified as problematic was found in Cloudflare Agents up to 0.3.9. This affects an unknown function of the file site/ai-playground/src/server.ts. The manipulation of the argument error_description results in cross site scripting.
This vulnerability is known as CVE-2026-1721. It is possible to launch the attack remotely. No exploit is available.
Upgrading the affected component is advised.