Vulnerability Details CVE-2026-40035
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 the Werkzeug debugger and disclose sensitive information or achieve remote code execution.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 32.6%
CVSS Severity
CVSS v3 Score 9.1
References