EUVD-2026-20777
GHSA-92wx-pxch-p9px
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionCVE.org
dfir-unfurl through 20250810 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.
AnalysisAI
Remote code execution in dfir-unfurl versions through 20250810 via exposed Werkzeug debugger. Improper string-based config parsing enables Flask debug mode by default, allowing unauthenticated remote attackers to access the interactive debugger interface and execute arbitrary Python code or extract sensitive application data including source code, environment variables, and stack traces. No public exploit identified at time of analysis.
Technical ContextAI
CWE-489 type confusion in configuration handling. The Flask debug parameter accepts string input instead of boolean, causing Python's truthy evaluation to enable debug mode for any non-empty string value. The Werkzeug debugger provides an interactive Python console accessible over HTTP without authentication when debug mode is active.
RemediationAI
Vendor-released security advisory available at https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-vg9h-jx4v-cwx2. Upgrade to patched version specified in advisory that implements boolean validation for debug configuration parameter. Immediate workaround: manually verify Flask app.run() calls use debug=False (boolean type) rather than string values. For production deployments, disable Flask debug mode explicitly in application configuration and deploy behind WSGI server (Gunicorn, uWSGI) rather than Flask development server. Restrict network access to application server using firewall rules until patch applied. Review application logs for suspicious debugger access attempts on /__werkzeug_debugger paths.
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Same weakness CWE-489 – Active Debug Code
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External POC / Exploit Code
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