{ "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" }