{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-83611","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-31T20:36:25.744Z","datePublished":"2026-09-01T14:34:12.618Z","dateUpdated":"2026-09-01T14:53:37.513Z"},"containers":{"cna":{"title":"xmldom: Parser silently accepts a not-well-formed end tag whose name is followed by a line break and trailing content","problemTypes":[{"descriptions":[{"cweId":"CWE-1286","lang":"en","description":"CWE-1286: Improper Validation of Syntactic Correctness of Input","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/xmldom/xmldom/security/advisories/GHSA-6h8r-xr42-gp59","tags":["x_refsource_CONFIRM"],"url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-6h8r-xr42-gp59"},{"name":"https://github.com/xmldom/xmldom/pull/1071","tags":["x_refsource_MISC"],"url":"https://github.com/xmldom/xmldom/pull/1071"},{"name":"https://github.com/xmldom/xmldom/pull/1072","tags":["x_refsource_MISC"],"url":"https://github.com/xmldom/xmldom/pull/1072"},{"name":"https://github.com/xmldom/xmldom/commit/4430189660b0d380ee9c9ee7550a1358688e8828","tags":["x_refsource_MISC"],"url":"https://github.com/xmldom/xmldom/commit/4430189660b0d380ee9c9ee7550a1358688e8828"},{"name":"https://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362","tags":["x_refsource_MISC"],"url":"https://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362"},{"name":"https://github.com/xmldom/xmldom/releases/tag/0.8.15","tags":["x_refsource_MISC"],"url":"https://github.com/xmldom/xmldom/releases/tag/0.8.15"},{"name":"https://github.com/xmldom/xmldom/releases/tag/0.9.12","tags":["x_refsource_MISC"],"url":"https://github.com/xmldom/xmldom/releases/tag/0.9.12"}],"affected":[{"vendor":"xmldom","product":"xmldom","versions":[{"version":"<= 0.6.0","status":"affected"}]},{"vendor":"@xmldom","product":"xmldom","versions":[{"version":">= 0.9.0, < 0.9.12","status":"affected"},{"version":">= 0.7.0, < 0.8.15","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-01T14:34:12.618Z"},"descriptions":[{"lang":"en","value":"xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, DOMParser.parseFromString() can silently accept an end tag such as </a\\njunk>, close the element, and discard the trailing content. On 0.9.x, the lib/sax.js end-tag validator inherits the multiline flag from reg(), allowing the first line to satisfy the anchored XML ETag production; older lines have no equivalent residue validation. This parser differential can bypass a parse-before-trust well-formedness gate, although it does not inject the discarded content; onError on 0.9.x and errorHandler on 0.8.x are the relevant reporting interfaces. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom."}],"source":{"advisory":"GHSA-6h8r-xr42-gp59","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-6h8r-xr42-gp59","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T14:53:15.050065Z","id":"CVE-2026-83611","options":[{"Exploitation":"poc"},{"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":"2026-09-01T14:53:37.513Z"}}]}}