{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73491",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-12T19:00:33.735Z",
        "datePublished": "2026-08-12T20:59:18.589Z",
        "dateUpdated": "2026-08-13T13:49:22.724Z"
    },
    "containers": {
        "cna": {
            "title": "Loofah `allowed_uri?` does not detect `javascript:` URIs split by named whitespace character references",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-184",
                            "lang": "en",
                            "description": "CWE-184: Incomplete List of Disallowed Inputs",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "LOW",
                        "subIntegrityImpact": "LOW",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 2.3,
                        "baseSeverity": "LOW",
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/flavorjones/loofah/security/advisories/GHSA-8whx-365g-h9vv",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-8whx-365g-h9vv"
                },
                {
                    "name": "https://github.com/flavorjones/loofah/pull/308",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/flavorjones/loofah/pull/308"
                },
                {
                    "name": "https://github.com/flavorjones/loofah/commit/5e91af861e3cdab47b91dd0b81f3afdfd13a5e19",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/flavorjones/loofah/commit/5e91af861e3cdab47b91dd0b81f3afdfd13a5e19"
                },
                {
                    "name": "https://github.com/flavorjones/loofah/releases/tag/v2.25.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/flavorjones/loofah/releases/tag/v2.25.2"
                }
            ],
            "affected": [
                {
                    "vendor": "flavorjones",
                    "product": "loofah",
                    "versions": [
                        {
                            "version": ">= 2.25.0, < 2.25.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-12T20:59:18.589Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character references &Tab; or &NewLine;. CGI.unescapeHTML leaves those references intact, so allowed_uri? reports the URL safe even though a browser decodes and strips the tab or line feed and executes the resulting javascript: URL. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2."
                }
            ],
            "source": {
                "advisory": "GHSA-8whx-365g-h9vv",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-13T13:49:09.263231Z",
                                "id": "CVE-2026-73491",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-13T13:49:22.724Z"
                }
            }
        ]
    }
}