@lpj
This is how path traversal sneaks into production Node.js apps 👇🏼
🔴 Left side
User input directly controls a filesystem path.
One ../../
And you’re outside uploads.
🟢 Right side
Absolute resolution + directory boundary enforcement.
The difference?
❌ Trusting input
✅ Enforcing boundaries
Node.js isn’t the problem.
Unvalidated filesystem access is.
Deep dive here 👇🏼
0 reply
0 recast
0 reaction