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enquirer EUVDEUVD-2026-42599

| CVE-2026-15187 LOW
Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)
2026-07-09 VulDB GHSA-5727-r6pv-59f5
Information Disclosure Prototype Pollution Enquirer
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:N/VI:L/VA:N/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
4.3 MEDIUM

Network vector retained per CVSS 4.0 source; PR:L because attacker must control question.name input; S:U and C:N/A:N because only limited local integrity impact is demonstrated.

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

3
Analysis Generated
Jul 09, 2026 - 17:10 vuln.today
Severity Changed
Jul 09, 2026 - 16:22 NVD
MEDIUM LOW
CVSS changed
Jul 09, 2026 - 16:22 NVD
5.3 (MEDIUM) 2.1 (LOW)

DescriptionCVE.org

A security flaw has been discovered in enquirer up to 2.4.1. Affected is the function Enquirer.set of the component Public Package API. The manipulation of the argument question.name results in improperly controlled modification of object prototype attributes. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report.

AnalysisAI

Prototype pollution in the enquirer npm package (versions up to 2.4.1) allows remote authenticated attackers to manipulate JavaScript Object.prototype attributes by injecting a crafted value into the question.name argument of the Enquirer.set() function. The vulnerability carries a low CVSS 4.0 score of 2.1, reflecting limited integrity-only impact scoped to the vulnerable system with no confidentiality or availability consequence. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege access
Delivery
Supply crafted question.name value
Exploit
Invoke Enquirer.set() without sanitization
Execution
Pollute Object.prototype
Impact
Achieve limited integrity modification in process
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the attacker has sufficient access (PR:L per CVSS 4.0) to supply a crafted value for the question.name argument to the Enquirer.set() function - either directly as an API consumer or indirectly through an application layer that exposes this parameter to user input. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 2.1 (Low) is consistent with the narrow blast radius: VI:L with no confidentiality or availability impact, and PR:L indicating the attacker must have some level of authenticated or authorized access. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with low-privilege access to an application that passes user-supplied input to enquirer's Enquirer.set() function submits a crafted question.name value such as __proto__[isAdmin]=true. The enquirer library processes this without sanitization, writing the property into Object.prototype and polluting the shared prototype chain for the entire Node.js process. …
Remediation No vendor-released patched version has been identified at the time of analysis - the fix status should be monitored via the GitHub issue at https://github.com/enquirer/enquirer/issues/487 and the VulDB entry at https://vuldb.com/vuln/377113. … 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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EUVD-2026-42599 vulnerability details – vuln.today
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