CVE-2020-26247

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{"affected": [{"affectedData": [{"product": "nokogiri", "vendor": "sparklemotion", "versions": [{"status": "affected", "version": "< 1.11.0.rc4"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:*", "matchCriteriaId": "F2ECF6A9-F5A7-43D2-A508-A1107B8CEF84", "versionEndExcluding": "1.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:nokogiri:nokogiri:1.11.0:rc1:*:*:*:ruby:*:*", "matchCriteriaId": "837DC793-18F6-4FD5-B3A4-369FEDC1C4BC", "vulnerable": true}, {"criteria": "cpe:2.3:a:nokogiri:nokogiri:1.11.0:rc2:*:*:*:ruby:*:*", "matchCriteriaId": "57AD249D-C891-45F2-8640-EBCEBA8D661D", "vulnerable": true}, {"criteria": "cpe:2.3:a:nokogiri:nokogiri:1.11.0:rc3:*:*:*:ruby:*:*", "matchCriteriaId": "B562CEEB-9707-42FC-A135-39DECE7E92A7", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed in Nokogiri version 1.11.0.rc4."}, {"lang": "es", "value": "Nokogiri es un Rubygem que proporciona analizadores de HTML, XML, SAX y Reader con compatibilidad con el selector XPath y CSS.&#xa0;En Nokogiri versiones anteriores a 1.11.0.rc4, se presenta una vulnerabilidad de tipo XXE.&#xa0;Los esquemas XML analizados por la funci\u00f3n Nokogiri::XML::Schema son confiables por defecto, permitiendo acceder a recursos externos por medio de la red, potencialmente permitiendo ataques de tipo XXE o SSRF.&#xa0;Este comportamiento es contrario a la pol\u00edtica de seguridad seguida por los mantenedores de Nokogiri, que consiste en tratar todas las entradas como no confiables por defecto siempre que sea posible.&#xa0;Esto es corregido en Nokogiri versi\u00f3n 1.11.0.rc4."}], "id": "CVE-2020-26247", "lastModified": "2026-06-17T03:07:54.800", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 2.6, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-12-30T19:15:12.920", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97b"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54m"}, {"source": "security-advisories@github.com", "tags": ["Permissions Required"], "url": "https://hackerone.com/reports/747489"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00007.html"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html"}, {"source": "security-advisories@github.com", "tags": ["Product", "Third Party Advisory"], "url": "https://rubygems.org/gems/nokogiri"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202208-29"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54m"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Permissions Required"], "url": "https://hackerone.com/reports/747489"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Third Party Advisory"], "url": "https://rubygems.org/gems/nokogiri"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202208-29"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-611"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-611"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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