{"id":"CVE-2026-79769","state":"PUBLISHED","title":"Nokogiri before 1.19.4 Invalid Memory Read via initialize_copy_with_args","description":"Nokogiri versions before 1.19.4 contain a possible invalid (out-of-bounds) memory read in the protected internal Node#initialize_copy_with_args helper behind Node#dup and #clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a non-Node argument (e.g., a Namespace), it reads an xmlNs out of bounds, crashing the process. This is only triggerable by a programming error and cannot be triggered by untrusted input or normal use of the public API. Only CRuby is affected. Version 1.19.4 adds a type check and raises TypeError.","publishedAt":"2026-08-25T15:16:02.372Z","updatedAt":"2026-08-26T16:11:11.096Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["sparklemotion nokogiri"],"affected":[{"vendor":"sparklemotion","product":"nokogiri","packageURL":"pkg:gem/nokogiri","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.19.4","versionType":"semver"},{"version":"1.19.4","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-g9g8-vgvw-g3vf","https://www.vulncheck.com/advisories/nokogiri-before-invalid-memory-read-via-initialize-copy-with-args"],"weaknesses":["CWE-843"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/79xxx/CVE-2026-79769.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79769","state":"PUBLISHED","datePublished":"2026-08-25T15:16:02.372Z","dateUpdated":"2026-08-26T16:11:11.096Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-25T14:29:43.527Z"},"containers":{"cna":{"title":"Nokogiri before 1.19.4 Invalid Memory Read via initialize_copy_with_args","descriptions":[{"lang":"en","value":"Nokogiri versions before 1.19.4 contain a possible invalid (out-of-bounds) memory read in the protected internal Node#initialize_copy_with_args helper behind Node#dup and #clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a non-Node argument (e.g., a Namespace), it reads an xmlNs out of bounds, crashing the process. This is only triggerable by a programming error and cannot be triggered by untrusted input or normal use of the public API. Only CRuby is affected. Version 1.19.4 adds a type check and raises TypeError."}],"affected":[{"vendor":"sparklemotion","product":"nokogiri","packageURL":"pkg:gem/nokogiri","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.19.4","versionType":"semver"},{"version":"1.19.4","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-g9g8-vgvw-g3vf","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-g9g8-vgvw-g3vf)"},{"url":"https://www.vulncheck.com/advisories/nokogiri-before-invalid-memory-read-via-initialize-copy-with-args","name":"VulnCheck Advisory: Nokogiri before 1.19.4 Invalid Memory Read via initialize_copy_with_args","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-843","lang":"en","description":"Access of Resource Using Incompatible Type ('Type Confusion')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-25T15:16:02.372Z"},"datePublic":"2026-06-18T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.4"}]}]}],"credits":[{"lang":"en","value":"cla7aye15I4nd","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-26T15:58:51.364011Z","id":"CVE-2026-79769","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-26T16:11:11.096Z"}}]}}}