CVE-2026-25587

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

10.0 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H                                    

Vulnerability Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, as Map is in SAFE_PROTOYPES, it's prototype can be obtained via Map.prototype. By overwriting Map.prototype.has the sandbox can be escaped. This vulnerability is fixed in 0.8.29.

Vulnerability Details

Published Date

February 05, 2026

Last Modified

February 06, 2026

CWE ID

CWE-94

Source

GitHub

Vendor

npm

Product

@nyariv/sandboxjs

External References

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-66h4-qj4x-38xp
https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3
https://github.com/advisories/GHSA-66h4-qj4x-38xp

CVE-2026-25587

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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