{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-26291",
        "STATE": "PUBLIC",
        "TITLE": "Hostname spoofing in URI.js"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "URI.js",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.19.4"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "medialize"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "URI.js is a javascript URL mutation library (npm package urijs). In URI.js before version 1.19.4, the hostname can be spoofed by using a backslash (`\\`) character followed by an at (`@`) character. If the hostname is used in security decisions, the decision may be incorrect. Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior. For example the URL `https://expected-example.com\\@observed-example.com` will incorrectly return `observed-example.com` if using an affected version. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class. Version 1.19.4 is patched against all known payload variants. Version 1.19.3 has a partial patch but is still vulnerable to a payload variant.]"
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-20 Improper Input Validation"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpg",
                "refsource": "CONFIRM",
                "url": "https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpg"
            },
            {
                "name": "https://www.npmjs.com/package/urijs",
                "refsource": "MISC",
                "url": "https://www.npmjs.com/package/urijs"
            },
            {
                "name": "https://github.com/medialize/URI.js/releases/tag/v1.19.4",
                "refsource": "MISC",
                "url": "https://github.com/medialize/URI.js/releases/tag/v1.19.4"
            },
            {
                "name": "https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155",
                "refsource": "MISC",
                "url": "https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-3329-pjwv-fjpg",
        "discovery": "UNKNOWN"
    }
}