Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/32406?format=api",
    "vulnerability_id": "VCID-khpz-njyn-5qd1",
    "summary": "Regular Expression Denial of Service in npm-user-validate\n`npm-user-validate` before version `1.0.1` is vulnerable to a Regular Expression Denial of Service (REDos). The regex that validates user emails took exponentially longer to process long input strings beginning with `@` characters.\n\n### Impact\nThe issue affects the `email` function. If you use this function to process arbitrary user input with no character limit the application may be susceptible to Denial of Service.\n\n### Patches\nThe issue is patched in version 1.0.1 by improving the regular expression used and also enforcing a 254 character limit.\n\n### Workarounds\nRestrict the character length to a reasonable degree before passing a value to `.emal()`; Also, consider doing a more rigorous sanitizing/validation beforehand.",
    "aliases": [
        {
            "alias": "GHSA-xgh6-85xh-479p"
        }
    ],
    "fixed_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/72641?format=api",
            "purl": "pkg:npm/npm-user-validate@1.0.1",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/npm-user-validate@1.0.1"
        }
    ],
    "affected_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/143073?format=api",
            "purl": "pkg:npm/npm-user-validate@1.0.0",
            "is_vulnerable": true,
            "affected_by_vulnerabilities": [
                {
                    "vulnerability": "VCID-khpz-njyn-5qd1"
                }
            ],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/npm-user-validate@1.0.0"
        }
    ],
    "references": [
        {
            "reference_url": "https://github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479p",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "LOW",
                    "scoring_system": "cvssv3.1_qr",
                    "scoring_elements": ""
                },
                {
                    "value": "LOW",
                    "scoring_system": "generic_textual",
                    "scoring_elements": ""
                }
            ],
            "url": "https://github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479p"
        },
        {
            "reference_url": "https://github.com/advisories/GHSA-xgh6-85xh-479p",
            "reference_id": "GHSA-xgh6-85xh-479p",
            "reference_type": "",
            "scores": [
                {
                    "value": "LOW",
                    "scoring_system": "cvssv3.1_qr",
                    "scoring_elements": ""
                }
            ],
            "url": "https://github.com/advisories/GHSA-xgh6-85xh-479p"
        }
    ],
    "weaknesses": [],
    "exploits": [],
    "severity_range_score": "0.1 - 3",
    "exploitability": "0.5",
    "weighted_severity": "2.7",
    "risk_score": 1.4,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-khpz-njyn-5qd1"
}