🛡️ CVE-2025-34146
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-1321 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.0
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
CWE CWE-1321
Public Exploit ✅ No
Source NVD
Published 2025-07-31
Updated 2026-06-02
Modified 2025-07-31
Fix URL N/A

Affected Packages

Software From version Fixed in
@nyariv/sandboxjs — —
unknown — —

Similar Threats

Patch Gap Protection

Running software with known vulnerabilities?

BotEraser can help reduce exposure by blocking IPs associated with exploit activity — even before a patch is available.

Start Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.