CVE-2026-73562Mongoose: Prototype pollution in the update casting via __proto__-prefixed dotted path (Schema._getSchema/path getter)
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
- Weakness (CWE)
- CWE-1321
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Automattic mongoose automattic:mongoose (from the name) | before 6.13.10; from 7.0.0, < 7.8.10; from 8.0.0, < 8.24.1; from 9.0.0, < 9.7.2 | CNA record |
References
- https://github.com/Automattic/mongoose/security/advisories/GHSA-664h-wqgq-64gwx-refsource-confirm
- https://github.com/Automattic/mongoose/commit/35a3f33bc9a0a28671f99e3c5010000425650d0fx-refsource-misc
- https://github.com/Automattic/mongoose/commit/7285466b860d3b511f8d07b2ab72656703ee707ax-refsource-misc
- https://github.com/Automattic/mongoose/commit/953d085bee5a16b5d6c5af33a156e6314d6d9a45x-refsource-misc
- https://github.com/Automattic/mongoose/commit/fab793b747131c68927888cba41cf3e6d6593740x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.