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mingo CVE-2026-15698

| EUVDEUVD-2026-43725 LOW
Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)
2026-07-14 VulDB GHSA-j7jf-w73f-7hjp
Prototype Pollution Information Disclosure Mingo
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.3 MEDIUM

PR:L reflects mandatory authenticated low-privilege API access; S:U as prototype pollution is scoped to the vulnerable Node.js process with no scope change.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Severity Changed
Jul 14, 2026 - 16:22 NVD
MEDIUM LOW
CVSS changed
Jul 14, 2026 - 16:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
Source Code Evidence Fetched
Jul 14, 2026 - 16:15 vuln.today
Analysis Generated
Jul 14, 2026 - 16:15 vuln.today

DescriptionCVE.org

A vulnerability was determined in kofrasa mingo up to 7.2.1. This impacts the function update/updateOne/updateMany of the component Update API. Executing a manipulation of the argument Set can lead to improperly controlled modification of object prototype attributes. The attack may be launched remotely. Upgrading to version 7.2.2 will fix this issue. This patch is called fadc398251792c2ba441cbc539f359fc7943c0c2. It is recommended to upgrade the affected component.

AnalysisAI

Prototype pollution in kofrasa mingo up to version 7.2.1 allows low-privileged remote attackers to corrupt JavaScript Object.prototype by supplying __proto__ as a field selector in $set, updateOne, or updateMany operations, injecting arbitrary properties into all objects within the Node.js process. Proof-of-concept exploit code exists (CVSS 4.0 E:P), and successful exploitation can cascade to application-wide privilege logic bypass, information disclosure, or denial of service depending on how the host application relies on inherited object properties. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate with low-privilege application credentials
Delivery
Craft update payload containing `__proto__` as field selector
Exploit
Submit payload to mingo-backed update API endpoint
Execution
mingo processes selector without `assertNoProto` guard
Persist
Object.prototype polluted with attacker-chosen properties
Impact
Exploit injected properties to bypass authorization checks or cause denial of service
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Vulnerability AssessmentAI

Exploitation Exploitation requires low-privilege authenticated access to an application that exposes mingo's update, updateOne, or updateMany functions with attacker-controlled field selectors - confirmed by the PR:L metric in the provided CVSS 4.0 vector. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.3 (Medium) with supplemental E:P indicates moderate severity and a demonstrated proof-of-concept. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated low-privilege user of a Node.js web application that exposes mingo-backed document update functionality sends a crafted HTTP request containing `{ "$set": { "__proto__.isAdmin": true } }` as the update payload. Mingo's `buildParams` function processes the selector without the `__proto__` guard present in versions prior to 7.2.2, writing to `Object.prototype` and injecting `isAdmin: true` on all subsequently created objects in the process. …
Remediation Upgrade mingo to version 7.2.2 or later, which is confirmed available at https://github.com/kofrasa/mingo/releases/tag/7.2.2 (patch commit fadc398251792c2ba441cbc539f359fc7943c0c2). … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-1321 – Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

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Same technique Information Disclosure

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CVE-2017-0213 HIGH POC
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CVE-2026-15698 vulnerability details – vuln.today
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