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🚨 [security] Update mongoose 6.2.7 → 6.13.9 (minor)#108

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🚨 [security] Update mongoose 6.2.7 → 6.13.9 (minor)#108
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@depfu depfu Bot commented May 5, 2026


🚨 Your current dependencies have known security vulnerabilities 🚨

This dependency update fixes known security vulnerabilities. Please see the details below and assess their impact carefully. We recommend to merge and deploy this as soon as possible!


Here is everything you need to know about this update. Please take a good look at what changed and the test results before merging this pull request.

What changed?

✳️ mongoose (6.2.7 → 6.13.9) · Repo · Changelog

Security Advisories 🚨

🚨 Mongoose's Improper Sanitization of $nor in sanitizeFilter May Allow NoSQL Injection

Impact

This vulnerability allows bypassing Mongoose’s sanitizeFilter query sanitization mechanism via the $nor operator.

When sanitizeFilter is enabled, Mongoose wraps query operators in $eq to neutralize them. However, prior to the fix, $nor was not included in the set of logical operators that are recursively sanitized. Because $nor accepts an array (like $and and $or), and arrays do not trigger hasDollarKeys(), malicious operators such as $ne, $gt, or $regex could be injected inside a $nor clause without being sanitized.

This may lead to:

  • Authentication bypass
  • Unauthorized data access
  • Data exfiltration

Affected users:

Applications that:

  • Explicitly enable sanitizeFilter
  • Pass unsanitized user-controlled input directly into query methods (e.g., Model.findOne(req.body)) and rely on sanitizeFilter to strip out query selectors

Applications that validate input schemas, whitelist fields, or avoid passing raw request bodies into queries are not affected. For example, Model.findOne({ user: req.body.user, pwd: req.body.pwd }) is not affected.

Patches

Patches have been released for all supported Mongoose release lines:

  • ^6.13.9
  • ^7.8.9
  • ^8.22.1
  • ^9.1.6

Workarounds

Delete $nor keys, use an additional schema validation library, or write middleware to strip out $nor from query filters.

Resources

sanitizeFilter documentation: https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()

Original blog post on sanitizeFilter: https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html

🚨 Mongoose search injection vulnerability

Mongoose versions prior to 8.8.3, 7.8.3, 6.13.5, and 5.13.23 are vulnerable to improper use of the $where operator. This vulnerability arises from the ability of the $where clause to execute arbitrary JavaScript code in MongoDB queries, potentially leading to code injection attacks and unauthorized access or manipulation of database data.

🚨 Mongoose Prototype Pollution vulnerability

Prototype Pollution in GitHub repository automattic/mongoose prior to 7.3.3, 6.11.3, and 5.13.20.

🚨 Mongoose Vulnerable to Prototype Pollution in Schema Object

Description

Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment.

Affected versions of this package are vulnerable to Prototype Pollution. The Schema.path() function is vulnerable to prototype pollution when setting the schema object. This vulnerability allows modification of the Object prototype and could be manipulated into a Denial of Service (DoS) attack.

Proof of Concept

// poc.js
const mongoose = require('mongoose');
const schema = new mongoose.Schema();

malicious_payload = 'proto.toString'

schema.path(malicious_payload, [String])

x = {}
console.log(x.toString()) // crashed (Denial of service (DoS) attack)

Impact

This vulnerability can be manipulated to exploit other types of attacks, such as Denial of service (DoS), Remote Code Execution, or Property Injection.

🚨 automattic/mongoose vulnerable to Prototype pollution via Schema.path

Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Affected versions of this package are vulnerable to Prototype Pollution. The Schema.path() function is vulnerable to prototype pollution when setting the schema object. This vulnerability allows modification of the Object prototype and could be manipulated into a Denial of Service (DoS) attack.

Release Notes

Too many releases to show here. View the full release notes.


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