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CVE-2026-40035

Unfurl

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.

CVSS 9.1EPSS 0.557%Risk 0.96
View source
Published
2026-04-08 22:16:24
Affected versions
<=2025.08
Type
Installed app
Last modified
2026-07-24 21:10:00
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N