{"id":"CVE-2026-57236","state":"PUBLISHED","title":"Nokogiri: Possible Use-After-Free when `Nokogiri::XML::Document#encoding=` raises an exception","description":"Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, calling Document#encoding= with an invalid encoding (e.g., a non-string, or a string containing a null byte) raises an exception, but only after freeing the document's current encoding string without replacing it. The document is left referencing freed memory, so the next call to Document#encoding reads invalid memory, which can cause a segfault or leak freed bytes into a Ruby String. Affects the CRuby (libxml2) implementation only; JRuby is not affected. This vulnerability is fixed in 1.19.4.","publishedAt":"2026-06-25T14:29:14.181Z","updatedAt":"2026-06-25T15:32:43.266Z","severity":{"score":1.7,"label":"Low","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["sparklemotion nokogiri"],"affected":[{"vendor":"sparklemotion","product":"nokogiri","versions":[{"version":"< 1.19.4","status":"affected"}]}],"references":["https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-5v8h-3h3q-446p"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57236.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57236","state":"PUBLISHED","datePublished":"2026-06-25T14:29:14.181Z","dateUpdated":"2026-06-25T15:32:43.266Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-24T02:21:33.812Z"},"containers":{"cna":{"title":"Nokogiri: Possible Use-After-Free when `Nokogiri::XML::Document#encoding=` raises an exception","descriptions":[{"lang":"en","value":"Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, calling Document#encoding= with an invalid encoding (e.g., a non-string, or a string containing a null byte) raises an exception, but only after freeing the document's current encoding string without replacing it. The document is left referencing freed memory, so the next call to Document#encoding reads invalid memory, which can cause a segfault or leak freed bytes into a Ruby String. Affects the CRuby (libxml2) implementation only; JRuby is not affected. This vulnerability is fixed in 1.19.4."}],"affected":[{"vendor":"sparklemotion","product":"nokogiri","versions":[{"version":"< 1.19.4","status":"affected"}]}],"references":[{"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-5v8h-3h3q-446p","name":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-5v8h-3h3q-446p","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":1.7,"baseSeverity":"LOW","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416: Use After Free","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-25T14:29:14.181Z"},"source":{"advisory":"GHSA-5v8h-3h3q-446p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T15:32:34.851256Z","id":"CVE-2026-57236","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-25T15:32:43.266Z"}}]}}}