{"id":"GHSA-v995-44v6-5fqm","summary":"JRuby: NONET is bypassed for external DTDs and entities when the systemId uses a short-form IPv4 host","details":"### Summary\n\nOn JRuby, the `NONET` parse option did not block an external DTD or entity whose system identifier used a short-form IPv4 host, such as `http://127.1/` or `http://169.254.43518/`, or was an absolute path such as `/x.dtd` in a document parsed from a network URL. An application that parses untrusted XML with `DTDLOAD`, `DTDVALID` or `NOENT` could be made to send network requests, potentially enabling SSRF.\n\nNokogiri 1.19.5 applies the `XML::Schema` check from [GHSA-8678-w3jw-xfc2](https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-8678-w3jw-xfc2): with `NONET` set, only local resources are loaded.\n\nOnly JRuby is affected. Default parse options are not affected.\n\n### Severity\n\nThe Nokogiri maintainers have evaluated this as low severity.\n\n### Mitigation\n\nUpgrade to Nokogiri 1.19.5 or later, or do not enable `DTDLOAD`, `DTDVALID` or `NOENT` for untrusted input.\n\n### Credit\n\nThis issue was responsibly reported by @arpitjain099.","aliases":["CVE-2026-126062"],"modified":"2026-11-10T21:00:04.025096383Z","published":"2026-11-10T20:52:38Z","database_specific":{"github_reviewed_at":"2026-11-10T20:52:38Z","nvd_published_at":null,"cwe_ids":["CWE-611","CWE-918"],"severity":"LOW","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v995-44v6-5fqm"},{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/pull/3752"},{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/commit/97f41b65f4ee0cac859b87f0b26d2648c4806cb8"},{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/commit/e448ca2827a9198644610fb730259e12baacdeac"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/GHSA-v995-44v6-5fqm.yml"},{"type":"PACKAGE","url":"https://github.com/sparklemotion/nokogiri"},{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/releases/tag/v1.19.5"}],"affected":[{"package":{"name":"nokogiri","ecosystem":"RubyGems","purl":"pkg:gem/nokogiri"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.5"}]}],"versions":["1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.1.0","1.1.1","1.10.0","1.10.0.rc1","1.10.1","1.10.10","1.10.2","1.10.3","1.10.4","1.10.5","1.10.6","1.10.7","1.10.8","1.10.9","1.11.0","1.11.0.rc1","1.11.0.rc2","1.11.0.rc3","1.11.0.rc4","1.11.1","1.11.2","1.11.3","1.11.4","1.11.5","1.11.6","1.11.7","1.12.0","1.12.0.rc1","1.12.1","1.12.2","1.12.3","1.12.4","1.12.5","1.13.0","1.13.1","1.13.10","1.13.2","1.13.3","1.13.4","1.13.5","1.13.6","1.13.7","1.13.8","1.13.9","1.14.0","1.14.0.rc1","1.14.1","1.14.2","1.14.3","1.14.4","1.14.5","1.15.0","1.15.1","1.15.2","1.15.3","1.15.4","1.15.5","1.15.6","1.15.7","1.16.0","1.16.0.rc1","1.16.1","1.16.2","1.16.3","1.16.4","1.16.5","1.16.6","1.16.7","1.16.8","1.17.0","1.17.1","1.17.2","1.18.0","1.18.0.rc1","1.18.1","1.18.10","1.18.2","1.18.3","1.18.4","1.18.5","1.18.6","1.18.7","1.18.8","1.18.9","1.19.0","1.19.1","1.19.2","1.19.3","1.19.4","1.2.0","1.2.1","1.2.2","1.2.3","1.3.0","1.3.1","1.3.2","1.3.3","1.4.0","1.4.1","1.4.2","1.4.2.1","1.4.3","1.4.3.1","1.4.4","1.4.4.1","1.4.4.2","1.4.5","1.4.6","1.4.7","1.5.0","1.5.0.beta.1","1.5.0.beta.2","1.5.0.beta.3","1.5.0.beta.4","1.5.1","1.5.1.rc1","1.5.10","1.5.11","1.5.2","1.5.3","1.5.3.rc2","1.5.3.rc3","1.5.3.rc4","1.5.3.rc5","1.5.3.rc6","1.5.4","1.5.4.rc1","1.5.4.rc2","1.5.4.rc3","1.5.5","1.5.5.rc1","1.5.5.rc2","1.5.5.rc3","1.5.6","1.5.6.rc1","1.5.6.rc2","1.5.6.rc3","1.5.7","1.5.7.rc1","1.5.7.rc2","1.5.7.rc3","1.5.8","1.5.9","1.6.0","1.6.0.rc1","1.6.1","1.6.2","1.6.2.1","1.6.2.rc1","1.6.2.rc2","1.6.2.rc3","1.6.3","1.6.3.1","1.6.3.rc1","1.6.3.rc2","1.6.3.rc3","1.6.4","1.6.4.1","1.6.5","1.6.6.1","1.6.6.2","1.6.6.3","1.6.6.4","1.6.7","1.6.7.1","1.6.7.2","1.6.7.rc2","1.6.7.rc3","1.6.7.rc4","1.6.8","1.6.8.1","1.6.8.rc1","1.6.8.rc2","1.6.8.rc3","1.7.0","1.7.0.1","1.7.1","1.7.2","1.8.0","1.8.1","1.8.2","1.8.3","1.8.4","1.8.5","1.9.0","1.9.0.rc1","1.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-v995-44v6-5fqm/GHSA-v995-44v6-5fqm.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}