CVE-2026-75931

{"id": "CVE-2026-75931", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-75931", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-24T16:28:35.705177Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "affectedData": [{"vendor": "fast-uri", "product": "fast-uri", "versions": [{"status": "affected", "version": "2.4.2", "lessThan": "2.4.5", "versionType": "semver"}, {"status": "unaffected", "version": "2.4.5", "versionType": "semver"}, {"status": "affected", "version": "3.1.3", "lessThan": "3.1.6", "versionType": "semver"}, {"status": "unaffected", "version": "3.1.6", "versionType": "semver"}, {"status": "affected", "version": "4.0.1", "lessThan": "4.1.3", "versionType": "semver"}, {"status": "unaffected", "version": "4.1.3", "versionType": "semver"}], "packageURL": "pkg:npm/fast-uri", "defaultStatus": "unaffected"}]}], "published": "2026-08-24T10:16:40.113", "references": [{"url": "https://cna.openjsf.org/security-advisories.html", "tags": ["Vendor Advisory"], "source": "ce714d77-add3-4f53-aff5-83d477b104bb"}, {"url": "https://github.com/fastify/fast-uri/security/advisories/GHSA-5jgf-p345-68v8", "tags": ["Vendor Advisory", "Mitigation"], "source": "ce714d77-add3-4f53-aff5-83d477b104bb"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "description": [{"lang": "en", "value": "CWE-436"}]}], "descriptions": [{"lang": "en", "value": "fast-uri is a URI parser for Node.js. It canonicalizes a host to its ASCII form only when the input carries an explicit scheme, so a scheme-relative reference such as a host preceded by two slashes is returned with its host verbatim and no error set. As a result fast-uri's own entry points disagree with each other: parse, resolve, normalize, and equal can yield different hosts for the same input depending only on whether a scheme is written out, and equal can return opposite verdicts for the same pair of hosts. An application that extracts a host with fast-uri to check it against a policy list and then resolves the same reference can make its decision on one host while the destination is another, enabling host confusion and policy bypass. The affected versions are 2.4.2 up to but not including 2.4.5, 3.1.3 up to but not including 3.1.6, and 4.0.1 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which canonicalize the host consistently across the resolve path. Users should upgrade to a patched version."}, {"lang": "es", "value": "fast-uri es un analizador de URI para Node.js. Canoniza un host a su forma ASCII solo cuyo la entrada lleva un esquema expl\u00edcito, por lo que una referencia relativa al esquema, como un host precedido por dos barras, se devuelve con su host literalmente y sin error establecido. Como resultado, los propios puntos de entrada de fast-uri discrepan entre s\u00ed: parse, resolve, normalize y equal pueden producir hosts diferentes para la misma entrada dependiendo \u00fanicamente de si un esquema est\u00e1 escrito, y equal puede devolver veredictos opuestos para el mismo par de hosts. Una aplicaci\u00f3n que extrae un host con fast-uri para verificarlo contra una lista de pol\u00edticas y luego resuelve la misma referencia puede tomar su decisi\u00f3n sobre un host mientras el destino es otro, lo que permite la confusi\u00f3n de hosts y la elusi\u00f3n de pol\u00edticas. Las versiones afectadas son 2.4.2 hasta, pero sin incluir, 2.4.5; 3.1.3 hasta, pero sin incluir, 3.1.6; y 4.0.1 hasta, pero sin incluir, 4.1.3. El problema est\u00e1 solucionado en 2.4.5, 3.1.6 y 4.1.3, que canonizan el host de manera consistente a lo largo de la ruta de resoluci\u00f3n. Los usuarios deben actualizar a una versi\u00f3n parcheada."}], "lastModified": "2026-10-14T13:10:00.187", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "F149CDDB-E136-4897-AF47-E52B987D489A", "versionEndExcluding": "2.4.5", "versionStartIncluding": "2.4.2"}, {"criteria": "cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "409743BF-17BF-49A4-906A-C60C3F4FBCE2", "versionEndExcluding": "3.1.6", "versionStartIncluding": "3.1.3"}, {"criteria": "cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "D52E210D-CFAD-4A63-AA90-E551EDE9DBC2", "versionEndExcluding": "4.1.3", "versionStartIncluding": "4.0.1"}], "operator": "OR"}]}], "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb"}