CVE-2025-34146
📛 CVE Title
nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS
Description
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulnCheck
- CVSS severity
- HIGH
- CVSS score
- 7.0 / 10
- CVSS vector
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- Effective score
- 7.0 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-1321 - Reserved
- 2025-04-15
- Published
- 2025-07-31 16:59 UTC
- Last updated
- 2026-05-15 13:14 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/34xxx/CVE-2025-34146.json
- Linked Threat
- CVE-2025-34146 — nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2025-07-31 15:15:36 UTC
- NVD last modified
- 2026-06-17 09:13:32 UTC
- EPSS score
- 0.0019 (probability of exploitation in next 30 days)
- EPSS percentile
- 9.35% vs all CVEs — higher = more likely to be exploited, as of 2026-06-29
NVD / KEV / EPSS data refreshed 2026-06-30 11:10 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2025-23278 - Assigner
- VulnCheck
- Published
- Jul 31, 2025, 2:59:35 PM
- Updated
- May 15, 2026, 11:14:54 AM
- EUVD base score (CVSS 4.0)
-
7.0 / 10
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 - EUVD-reported EPSS
- 1.4600
- Vendors
- nyariv
- Products
-
sandboxjs (* ≤0.8.23)sandboxjs (0 ≤0.8.23)
- Aliases
-
GHSA-9qm3-6qrr-c76m
ENISA description: 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.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| nyariv | sandboxjs |
0 (affected)
|
— |
Vendor references (4)
References embedded in the original CVE record by the assigning CNA.
- https://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3 issue-trackingexploit
- https://github.com/nyariv/SandboxJS/issues/31 patchvendor-advisory
- https://www.npmjs.com/package/@nyariv/sandboxjs product
- https://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos third-party-advisory
MITRE references (4) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- https://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3 issue-tracking, exploit
- https://github.com/nyariv/SandboxJS/issues/31 issue-tracking
- https://www.npmjs.com/package/@nyariv/sandboxjs product
- https://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos third-party-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (4)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3 disclosure@vulncheck.com
- https://github.com/nyariv/SandboxJS/issues/31 disclosure@vulncheck.com
- https://www.npmjs.com/package/@nyariv/sandboxjs disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos disclosure@vulncheck.com
Indicators (1)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| domain |
object.prototype
|
no local data | 2026-05-18 21:19 UTC |
Remediations (25)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-09-09 18:15 UTC -
web:nvd.nist.gov
Vulnerabilities All vulnerabilities in the NVD have been assigned a CVE identifier and thus, abide by the definition below. CVE defines a vulnerability as: "A weakness in the computational logic (e.g., code) found in software and hardware components that, when exploited, results in a negative impact to confidentiality, integrity, or availability. Mitigation of the vulnerabilities in this ...
2026-09-09 18:15 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-09-09 18:15 UTC -
web:www.oracle.com
This Critical Patch Update contains 374 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at October 2025 Critical Patch Update: Executive Summary and Analysis.
2026-09-09 18:15 UTC -
web:helpx.adobe.com
Adobe has released a security update for Adobe Commerce and Magento Open Source. This update resolves a critical vulnerability that could result in arbitrary code execution. Adobe is aware of CVE -2026-75650 being exploited in the wild.
2026-09-09 18:15 UTC -
web:helpx.adobe.com
This page contains important information regarding security vulnerabilities that could affect specific versions of Adobe products. Use this information to take the prescribed corrective actions.
2026-09-09 18:15 UTC -
web:www.nist.gov
NIST maintains the National Vulnerability Database (NVD), a repository of information on software and hardware flaws that can compromise computer security. This is a key piece of the nation's cybersecurity infrastructure.
2026-09-09 18:15 UTC -
web:www.oracle.com
Additional CVEs addressed are: The patch for CVE -2026-34481 also addresses CVE -2026-34477, CVE -2026-34478, CVE -2026-34479, and CVE -2026-34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...
2026-09-09 18:15 UTC -
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-22 13:27 UTC -
web:cybersecuritynews.com
Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.
2026-05-22 13:27 UTC -
web:layerlogix.com
April 2026 Patch Tuesday drops today. Here's what's critical, what to patch first, and how Houston IT teams should handle deployment — including the Secure Boot certificate deadline reminder.
2026-05-22 13:27 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-22 13:27 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-22 13:27 UTC -
web:redmondmag.com
Microsoft this week released one of the largest Patch Tuesday bundles in its history, delivering fixes for 163 new Microsoft CVEs in a month that includes three zero-days and eight Critical-rated ...
2026-05-22 13:27 UTC -
web:www.notebookcheck.net
Microsoft April 2026 Patch Tuesday fixes 167 vulnerabilities, including an actively exploited SharePoint zero-day. Windows 11 KB5083769 and KB5082052 bring new builds and RDP security.
2026-05-22 13:27 UTC -
web:windows101tricks.com
Microsoft's April 2026 Patch Tuesday update, released on April 14, 2026, addresses 167 vulnerabilities, including two actively exploited zero-days and eight critical flaws. The update primarily targets Windows 10/11, Microsoft Office, SharePoint Server, and .NET Framework, and fixes issues such as Remote Code Execution (RCE) and Elevation of Privilege (EoP).
2026-05-22 02:49 UTC -
web:krebsonsecurity.com
Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.
2026-05-22 02:49 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-22 02:49 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-22 02:49 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-05-22 02:49 UTC -
web:blog.qualys.com
May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…
2026-05-22 02:49 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-22 02:49 UTC -
web:www.pcworld.com
This month's Patch Tuesday brings over 80 fixes for various security vulnerabilities. Fortunately, none are actively being exploited in the wild yet.
2026-05-22 02:49 UTC -
web:www.techrepublic.com
Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.
2026-05-22 02:49 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-22 02:49 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2025-34146.json.
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