CVE-2026-73562
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk30th percentile - higher than 30% of all known CVEs
Summary
Mongoose before versions 6.13.10, 7.8.10, 8.24.1, and 9.7.2 has a prototype pollution vulnerability when passing a user-controlled update with a __proto__.x dotted path under $set. The casting process can set properties on Object.prototype, affecting application integrity and availability.
Risk Assessment
Risk of prototype pollution, potentially leading to data integrity and availability issues.
Recommendation
Upgrade Mongoose to one of the fixed versions: 6.13.10, 7.8.10, 8.24.1, or 9.7.2.
Original NVD description (English source)
Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Prior to 6.13.10, 7.8.10, 8.24.1, and 9.7.2, passing a user-controlled update such as MyModel.updateOne(filter, req.body) can exploit Mongoose update casting with a __proto__.x dotted path under $set. Schema.prototype.path and Schema.prototype._getPathType can treat inherited properties of schema.paths and schema.nested as schema types, allowing the casting process to set $fullPath and $parentSchemaDocArray on Object.prototype before throwing. This prototype pollution makes those properties visible on newly created objects and can cause application integrity and availability impacts. This issue is fixed in versions 6.13.10, 7.8.10, 8.24.1, and 9.7.2.