{"id":"CVE-2026-86138","state":"PUBLISHED","title":"In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.","description":"In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.","publishedAt":"2026-09-05T04:21:53.127Z","updatedAt":"2026-09-08T18:04:58.145Z","severity":{"score":6.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","source":"mitre"},"assigner":"mitre","products":["xmlsoft libxml2"],"affected":[{"vendor":"xmlsoft","product":"libxml2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.15.4","versionType":"semver"}]}],"references":["https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4","https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/86xxx/CVE-2026-86138.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86138","state":"PUBLISHED","datePublished":"2026-09-05T04:21:53.127Z","dateUpdated":"2026-09-08T18:04:58.145Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-09-05T04:21:52.780Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow."}],"affected":[{"vendor":"xmlsoft","product":"libxml2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.15.4","versionType":"semver"}]}],"references":[{"url":"https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4"},{"url":"https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":6.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-09-05T04:21:53.127Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*","versionEndExcluding":"2.15.4"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T18:04:19.094572Z","id":"CVE-2026-86138","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":"2026-09-08T18:04:58.145Z"}}]}}}