OWASP Threat Dragon
OWASP Threat Dragon is an open-source threat-modelling tool for drawing data-flow diagrams and recording threats and mitigations.
Legal & ethical use. Use this tool only on systems, networks and data that you own or have explicit written permission to test. Unauthorised access or scanning can break computer-misuse laws (for example Pakistan's Prevention of Electronic Crimes Act, 2016, and equivalents elsewhere). Practise in your own lab or in authorised environments such as CTFs.
What it is used for
- Threat-model a new feature before coding
- Teach STRIDE
Key features
- Data-flow diagrams
- STRIDE support
- Web and desktop apps
Installation
Use the web app or download the desktop version from the project page.
Beginner usage guide
Draw a simple login flow, list threats per element and note mitigations.
Example commands
Run these only against your own lab or authorised targets. Placeholder addresses such as 192.0.2.x are documentation ranges.
Concept (GUI)
New model → add elements → ThreatThreat Dragon is graphical; there is no CLI workflow.
References
Source verification
Last reviewed: 2026-10-27
Links checked over HTTP: 2026-10-27 07:51 UTC — official: 200, docs: 200, repo: 200
Commands were written from the official documentation and have not been executed on this site; test them in your lab.