CVE-2026-73492

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{"affected": [{"affectedData": [{"product": "loofah", "vendor": "flavorjones", "versions": [{"status": "affected", "version": ">= 2.25.0, < 2.25.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as &#58, &#9, &#10, or &#13. CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. 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."}, {"lang": "es", "value": "Loofah es una biblioteca general para manipular y transformar documentos y fragmentos HTML/XML, construida sobre Nokogiri. Desde la versi\u00f3n 2.25.0 hasta la 2.25.2, Loofah::HTML5::Scrub.allowed_uri? no rechaza URIs javascript_disabled: o vbscript: cuyo esquema est\u00e1 dividido por referencias de caracteres num\u00e9ricos sin punto y coma como y #58, y #9, y #10, o y #13. CGI.unescapeHTML deja estas referencias codificadas, por lo que allowed_uri? informa que la URL es segura a pesar de que un navegador decodifica un colon codificado o elimina espacios en blanco codificados y ejecuta el esquema URI resultante. Este problema afecta solo a los llamadores que pasan cadenas codificadas en HTML directamente a allowed_uri?; la ruta sanitize() predeterminada de Loofah no se ve afectada. Este problema est\u00e1 solucionado en la versi\u00f3n 2.25.2."}], "id": "CVE-2026-73492", "lastModified": "2026-10-24T15:10:00.190", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73492", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-14T22:17:58.982852Z", "version": "2.0.3"}}]}, "published": "2026-08-12T22:17:16.527", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/flavorjones/loofah/commit/f1be9d893b5a8dd79240441a912d8897e74c38c0"}, {"source": "security-advisories@github.com", "url": "https://github.com/flavorjones/loofah/pull/308"}, {"source": "security-advisories@github.com", "url": "https://github.com/flavorjones/loofah/releases/tag/v2.25.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-5qhf-9phg-95m2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-184"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "loofah: Loofah: Arbitrary code execution due to URI scheme bypass", "id": "2515000", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515000"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-76", "details": ["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: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as &#58, &#9, &#10, or &#13. CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. 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.", "A flaw was found in Loofah, a library used for processing HTML and XML documents. The 'allowed_uri?' function, intended to validate Uniform Resource Identifiers (URIs), does not correctly identify and reject 'javascript:' or 'vbscript:' URIs when their scheme is obscured by specific HTML-encoded numeric character references. This oversight allows a browser to decode and execute the manipulated URI, potentially leading to arbitrary code execution. This issue specifically impacts applications that directly provide HTML-encoded strings to the 'allowed_uri?' function."], "name": "CVE-2026-73492", "package_state": [{"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Fix deferred", "package_name": "3scale-amp2/system-rhel8", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Fix deferred", "package_name": "3scale-amp2/system-rhel9", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Fix deferred", "package_name": "3scale-amp2/zync-rhel9", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "rubygem-loofah", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Not affected", "package_name": "satellite:el8/rubygem-loofah", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Not affected", "package_name": "tfm-rubygem-graphql", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-08-12T21:00:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-73492\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-73492\nhttps://github.com/flavorjones/loofah/commit/f1be9d893b5a8dd79240441a912d8897e74c38c0\nhttps://github.com/flavorjones/loofah/pull/308\nhttps://github.com/flavorjones/loofah/releases/tag/v2.25.2\nhttps://github.com/flavorjones/loofah/security/advisories/GHSA-5qhf-9phg-95m2"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.25.0,2.25.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "loofah", "source": "cna", "vendor": "flavorjones"}, "product": "loofah", "vendor": "flavorjones"}], "created": "2026-08-13T02:45:03.261490+00:00", "updated": "2026-08-15T02:00:04.205833+00:00", "vendors": ["flavorjones", "flavorjones$PRODUCT$loofah"]}