CVE-2026-40035
Unfurl - Werkzeug Debugger Exposure via String Config Parsing
- State
- Published
- Severity
- 9.3 Critical
- Published
- Apr 8, 2026
- Updated
- Oct 8, 2026
- Reserved
- Apr 8, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-489 Active Debug Code
Affected Products
| Product | Versions |
|---|---|
unfurlobsidianforensics |
|
References
- GHSA Advisory GHSA-vg9h-jx4v-cwx2vendor-advisory
- VulnCheck Advisory: dfir-unfurl - Werkzeug Debugger Exposure via String Config Parsingthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.