Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/50035?format=api",
    "vulnerability_id": "VCID-h39s-93bn-h3ea",
    "summary": "@nyariv/sandboxjs has Sandbox Escape via Prototype `Whitelist` Bypass and Host Prototype Pollution\nA sandbox escape is possible by shadowing `hasOwnProperty` on a sandbox object, which disables prototype `whitelist` enforcement in the property-access path. This permits direct access to `__proto__` and other blocked prototype properties, enabling **host `Object.prototype` pollution** and persistent cross-sandbox impact.\n\nThe issue was reproducible on Node `v23.9.0` using the project’s current build output. The bypass works with default `Sandbox` configuration and does not require custom globals or `whitelist`s.",
    "aliases": [
        {
            "alias": "CVE-2026-25586"
        },
        {
            "alias": "GHSA-jjpw-65fv-8g48"
        }
    ],
    "fixed_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/73879?format=api",
            "purl": "pkg:npm/%40nyariv/sandboxjs@0.8.29",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/%2540nyariv/sandboxjs@0.8.29"
        }
    ],
    "affected_packages": [],
    "references": [
        {
            "reference_url": "https://github.com/nyariv/SandboxJS",
            "reference_id": "",
            "reference_type": "",
            "scores": [],
            "url": "https://github.com/nyariv/SandboxJS"
        },
        {
            "reference_url": "https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3",
            "reference_id": "",
            "reference_type": "",
            "scores": [],
            "url": "https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3"
        },
        {
            "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25586",
            "reference_id": "CVE-2026-25586",
            "reference_type": "",
            "scores": [],
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25586"
        },
        {
            "reference_url": "https://github.com/advisories/GHSA-jjpw-65fv-8g48",
            "reference_id": "GHSA-jjpw-65fv-8g48",
            "reference_type": "",
            "scores": [],
            "url": "https://github.com/advisories/GHSA-jjpw-65fv-8g48"
        },
        {
            "reference_url": "https://github.com/nyariv/SandboxJS/security/advisories/GHSA-jjpw-65fv-8g48",
            "reference_id": "GHSA-jjpw-65fv-8g48",
            "reference_type": "",
            "scores": [],
            "url": "https://github.com/nyariv/SandboxJS/security/advisories/GHSA-jjpw-65fv-8g48"
        }
    ],
    "weaknesses": [
        {
            "cwe_id": 74,
            "name": "Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')",
            "description": "The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component."
        },
        {
            "cwe_id": 937,
            "name": "OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities",
            "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013."
        },
        {
            "cwe_id": 1035,
            "name": "OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities",
            "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017."
        }
    ],
    "exploits": [],
    "severity_range_score": null,
    "exploitability": null,
    "weighted_severity": null,
    "risk_score": null,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-h39s-93bn-h3ea"
}