๐Ÿ›ก๏ธ CVE-2026-40035
๐Ÿ”ด CVSS 9.1 โ€” Critical โš ๏ธ Exploit Public CWE-489 NVD
9.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-489
Public Exploit โš ๏ธ Yes
Source NVD
Published 2026-04-08
Updated 2026-06-02
Modified 2026-04-17
Fix URL N/A

Affected Packages

Software From version Fixed in
unfurl โ€” 2025.08

Similar Threats

Exploit Protection

Help block exploit attempts

BotEraser is designed to detect and help reduce malicious bot traffic that may target known vulnerabilities on your site.

Try BotEraser Free โ†’

No credit card required  ยท  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.