mongoose

### Impact _What kind of vulnerability is it? Who is impacted?_ Prototype pollution in update casting: passing a user-controlled update to a Mongoose update, like `MyModel.updateOne(filter, req.body)`, can cause Mongoose to set `$fullPath` and `$parentSchemaDocArray` on `Object.prototype`. Example: ```javascript const mongoose = require('mongoose'); console.log('before:', Object.prototype.$fullPath); // undefined const User = mongoose.model('User', new mongoose.Schema({ name: String })); const malicious = JSON.parse('{"$set": {"__proto__.x": "anything"}}'); // attacker-control

CVE: CVE-2026-73562

### 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 bypas

CVE: CVE-2026-42334

Mongoose versions prior to 8.9.5, 7.8.4, and 6.13.6 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. NOTE: this issue exists because of an incomplete fix for CVE-2024-53900.

CVE: CVE-2025-23061

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.

CVE: CVE-2024-53900

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

CVE: CVE-2023-3696

### 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 ```js // poc.js const mongoose = require('mongoose'); const schema = new mongoose.Schema(); malicious_payload = '__proto__.toString' schema.path(malicious_payload, [St

CVE: CVE-2022-24304

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.

CVE: CVE-2022-2564

Versions of `mongoose` before 4.3.6, 3.8.39 are vulnerable to remote memory exposure. Trying to save a number to a field of type Buffer on the affected mongoose versions allocates a chunk of uninitialized memory and stores it in the database. ## Recommendation Update to version 4.3.6, 3.8.39 or later.

Automattic Mongoose through 5.7.4 allows attackers to bypass access control (in some applications) because any query object with a `_bsontype` attribute is ignored. For example, adding `"_bsontype":"a"` can sometimes interfere with a query filter. NOTE: this CVE is about Mongoose's failure to work around this _bsontype special case that exists in older versions of the bson parser (aka the mongodb/js-bson project).

CVE: CVE-2019-17426