AIKIDO-2026-943691
mongoose is vulnerable to NoSQL Injection
59
Medium Risk
This Affects:
mongooseTL;DR
Mongoose executes count, countDocuments, and cursor queries by casting the filter through a path that does not apply the sanitizeFilter option. When an application enables sanitizeFilter and passes user-controlled input into these query methods, embedded MongoDB query operators such as $ne or $where are not neutralized the way they are for other query methods. Untrusted operators can therefore alter query semantics or evaluate server-side predicates, defeating the sanitization the application relies on. The fix routes these executions through _castConditions, applying sanitizeFilter and rejecting disallowed operators.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your application enables the sanitizeFilter option and passes user-controlled input directly into count, countDocuments, or cursor queries.
Background info
mongoose is vulnerable to NoSQL Injection in versions 9.0.0 - 9.9.1, 8.0.0 - 8.24.2, 7.0.0 - 7.8.11 and 6.0.0 - 6.13.10.
How to fix this
Upgrade the mongoose library to the patch version.
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