EUVD-2026-58176
GHSA-664h-wqgq-64gw
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V3 - Web Frontend Security Prototype pollution prevention
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Aug 13, 2026
Prototype pollution in Mongoose's update casting mechanism allows remote attackers (PR:N per CVSS vector) to corrupt Object.prototype by embedding a __proto__-prefixed dotted key inside a $set operator in any update payload passed without sanitization to Mongoose update operations. All major Mongoose release lines are affected below versions 6.13.10, 7.8.10, 8.24.1, and 9.7.2, impacting Node.js application integrity and availability wherever the req.body-to-updateOne anti-pattern exists. Publicly available exploit code exists in the GHSA advisory; no CISA KEV listing is recorded at time of analysis.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in npm
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Primary rating from Vendor (GitHub_M) · only source for this CVE.
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
1DescriptionCVE.org
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.
Blast Radius
ecosystem impact- 2 npm packages depend on mongoose (2 direct, 0 indirect)
Ecosystem-wide dependent count for version 7.0.0.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
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Exploit-DB