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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-34146",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2025-04-15T19:15:22.564Z",
"datePublished": "2025-07-31T14:59:35.716Z",
"dateUpdated": "2026-10-08T15:21:18.196Z"
},
"containers": {
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{
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"modules": [
"dist/node/executor.js",
"dist/node/parser.js"
],
"product": "sandboxjs",
"vendor": "nyariv",
"versions": [
{
"lessThanOrEqual": "0.8.23",
"status": "affected",
"version": "0",
"versionType": "semver"
}
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"credits": [
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"type": "finder",
"value": "Hagrid29"
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"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "<p>A prototype pollution vulnerability exists in <code>@nyariv/sandboxjs</code> versions &lt;= 0.8.23, allowing attackers to inject arbitrary properties into <code>Object.prototype</code> via crafted JavaScript code. This can result in a denial-of-service (DoS) condition or, under certain conditions, escape the sandboxed environment intended to restrict code execution. The vulnerability stems from insufficient prototype access checks in the sandbox’s executor logic, particularly in the handling of JavaScript function objects returned.</p>"
}
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"value": "A prototype pollution vulnerability exists in @nyariv/sandboxjs versions <= 0.8.23, allowing attackers to inject arbitrary properties into Object.prototype via crafted JavaScript code. This can result in a denial-of-service (DoS) condition or, under certain conditions, escape the sandboxed environment intended to restrict code execution. The vulnerability stems from insufficient prototype access checks in the sandbox’s executor logic, particularly in the handling of JavaScript function objects returned."
}
],
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"cvssV4_0": {
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
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"format": "CVSS",
"scenarios": [
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"lang": "en",
"value": "GENERAL"
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}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1321",
"description": "CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')",
"lang": "en",
"type": "CWE"
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"shortName": "VulnCheck",
"dateUpdated": "2026-10-08T15:21:18.196Z"
},
"references": [
{
"tags": [
"issue-tracking",
"exploit"
],
"url": "https://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/nyariv/SandboxJS/issues/31"
},
{
"tags": [
"product"
],
"url": "https://www.npmjs.com/package/@nyariv/sandboxjs"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS",
"x_generator": {
"engine": "Vulnogram 0.2.0"
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},
"adp": [
{
"metrics": [
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"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-07-31T20:06:42.380992Z",
"id": "CVE-2025-34146",
"options": [
{
"Exploitation": "poc"
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{
"Automatable": "no"
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{
"Technical Impact": "partial"
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"role": "CISA Coordinator",
"version": "2.0.3"
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"title": "CISA ADP Vulnrichment",
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}