CVE-2026-40035
Unfurl - Werkzeug Debugger Exposure via String Config Parsing
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-489 |
| Vendor | obsidianforensics |
| Product | unfurl |
| Published | Apr 8, 2026 |
| Last Updated | Apr 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
obsidianforensics / unfurl
0 ≤ 2025.08
References
Credits
🔍 Mobasi Security Team