cvedb.io
CVE-2026-40035
CRITICAL · CVSS 9.1
EPSS exploitation probability: 0%
Published 2026-04-08T22:16:24.010 · Last modified 2026-06-17T10:44:38.640

Summary

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.

Affected products

ryandfir — unfurl

Does this affect you?

Add your gear to cvedb and we'll alert you only when ryandfir ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.