CVE-2026-40035 Unfurl - Werkzeug Debugger Exposure via String Config Parsing

Unfurl through 2025.08 contains an improper input validation vulnerability in config parsing that enables Flask debug mode by default. The debug configuration value is read as a string and passed directly to app.run, causing any non-empty string to evaluate truthy, allowing attackers to access th...

Unfurl's debug mode cannot be disabled due to string config parsing (Werkzeug debugger exposure)

Summary The Unfurl web app enables Flask debug mode even when configuration sets debug = False. The config value is read as a string and passed directly to app.rundebug=..., so any non-empty string evaluates truthy. This leaves the Werkzeug debugger active by default. Details - unfurl/app.py:weba...