{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123202","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-05T17:58:50.610Z","datePublished":"2026-11-05T18:16:38.397Z","dateUpdated":"2026-11-05T19:04:52.864Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T18:16:38.397Z"},"datePublic":"2026-10-29T00:00:00.000Z","title":"libnxml before 0.18.6 Stack-based Buffer Overflow via long multi-byte XML name","descriptions":[{"lang":"en","value":"libnxml before 0.18.6 contains a stack-based buffer overflow vulnerability in src/nxml_parser.c that allows remote attackers to write past a 1024-byte stack buffer via long XML names. Attackers can supply XML or RSS feeds with a 1022-character element, attribute, DOCTYPE or entity name ending in a multi-byte UTF-8 character to crash parsing applications."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Stack-based Buffer Overflow","cweId":"CWE-121","type":"CWE"}]}],"affected":[{"vendor":"bakulf","product":"libnxml","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"0.18.6","status":"affected","versionType":"semver"}],"packageURL":"pkg:github/bakulf/libnxml","repo":"https://github.com/bakulf/libnxml"}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/bakulf/libnxml/commit/fbac242374883edf2ec14127ca6d2accf4704b6a","tags":["patch"]},{"url":"https://github.com/bakulf/libnxml/releases/tag/0.18.6","tags":["release-notes"],"name":"libnxml 0.18.6 Release Notes"},{"url":"https://github.com/bakulf/libnxml/blob/9272d1cd6fee88fe7fd4fd812736d95a6ba25f2f/src/nxml_parser.c#L952-L958","tags":["technical-description"]},{"name":"VulnCheck Advisory: libnxml before 0.18.6 Stack-based Buffer Overflow via long multi-byte XML name","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/libnxml-before-0.18.6-stack-based-buffer-overflow-via-long-multi-byte-xml-name"}],"credits":[{"lang":"en","value":"Deus Rex","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-05T19:04:41.118484Z","id":"CVE-2026-123202","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-05T19:04:52.864Z"}}]}}