{"affected":[{"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-p67v-3w7g-wjg7/GHSA-p67v-3w7g-wjg7.json"},"package":{"ecosystem":"RubyGems","name":"nokogiri","purl":"pkg:gem/nokogiri"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.19.4"}],"type":"ECOSYSTEM"}],"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","1.2.0","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"]}],"aliases":["CVE-2026-57437"],"database_specific":{"cwe_ids":["CWE-416"],"github_reviewed":true,"github_reviewed_at":"2026-06-19T16:37:13Z","nvd_published_at":null,"severity":"LOW"},"details":"### Summary\n\n`Nokogiri::XML::XPathContext` did not keep its source document alive for garbage collection. If an `XPathContext` outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault.\n\nThis is only reachable when application code constructs an `XPathContext` directly and lets the document become unreachable while continuing to use the context. The normal `Document#xpath`, `#css`, and related search methods are not affected, and it is not triggerable by malicious document input.\n\nNokogiri 1.19.4 makes `XPathContext` keep its source document alive for as long as the context exists.\n\nOnly the CRuby implementation is affected. JRuby is not affected.\n\n### Severity\n\nThe Nokogiri maintainers have evaluated this as low severity. Reaching it requires an unusual API-usage pattern that does not arise during normal use. The application must construct an `XML::XPathContext` directly and continue using it after allowing its source document to be garbage-collected. Nokogiri 1.19.4 makes this pattern safe with no change to the public API. The context now keeps its source document alive for as long as it exists.\n\n### Mitigation\n\nUpgrade to Nokogiri 1.19.4 or later.\n\nAs a workaround, ensure the source document remains referenced for as long as any `XPathContext` created from it is in use. The standard `Document#xpath`, `#css`, and related search methods already do this and are unaffected.\n\n### Credit\n\nThis issue was responsibly reported by Zheng Yu from depthfirst.com.","id":"GHSA-p67v-3w7g-wjg7","modified":"2026-09-10T03:51:09.256741560Z","published":"2026-06-19T16:37:13Z","references":[{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-p67v-3w7g-wjg7"},{"type":"PACKAGE","url":"https://github.com/sparklemotion/nokogiri"}],"schema_version":"1.9.0","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear","type":"CVSS_V4"}],"summary":"Nokogiri: Possible Use-After-Free when directly using `NokogirI::XML::XPathContext` beyond document lifetime"}