CVE-2026-1721 – Reflected Cross-Site Scripting (XSS) vulnerability in AI Playground site

CVE ID : CVE-2026-1721

Published : Feb. 13, 2026, 3:15 a.m. | 1 hour, 12 minutes ago

Description : Summary

A Reflected Cross-Site Scripting (XSS) vulnerability was discovered in the AI Playground’s OAuth callback handler. The `error_description` query parameter was directly interpolated into an HTML script tag without proper escaping, allowing attackers to execute arbitrary JavaScript in the context of the victim’s session.

Root cause

The OAuth callback handler in `site/ai-playground/src/server.ts` directly interpolated the `authError` value, sourced from the `error_description` query parameter, into an inline `