Unfurl - Werkzeug Debugger Exposure via String Config Parsing
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.
CVE-2026-40035
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-40035
unfurl
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "obsidianforensics",
"product": "unfurl",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "custom",
"lessThanOrEqual": "2025.08"
}
],
"packageURL": "pkg:pypi/dfir-unfurl",
"packageName": "dfir-unfurl",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-40035
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #12718 · Revision 1
- Added to Heist Feed
- Publisher date