CVE-2026-42334
Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment.
Impact
Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Prior to 6.13.9, 7.8.9, 8.22.1, and 9.1.6, a 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 vulnerability is fixed in 6.13.9, 7.8.9, 8.22.1, and 9.1.6.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | mongoose | < 6.13.9 | 6.13.9 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mongoosejs | Mongoose | before 6.13.9 from 7.0.0 before 7.8.9 from 8.0.0 before 8.22.1 from 9.0.0 before 9.1.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-wpg9-53fq-2r8h
- https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
- https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()
- https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-42334