{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-83612", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-31T20:36:25.744Z", "datePublished": "2026-09-01T14:36:23.638Z", "dateUpdated": "2026-09-01T15:30:10.060Z"}, "containers": {"cna": {"title": "xmldom: HTML raw-text closing-tag case mismatch causes output amplification", "problemTypes": [{"descriptions": [{"cweId": "CWE-178", "lang": "en", "description": "CWE-178: Improper Handling of Case Sensitivity", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"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", "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"}}], "references": [{"name": "https://github.com/xmldom/xmldom/security/advisories/GHSA-6mj3-qw4j-hgrw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-6mj3-qw4j-hgrw"}, {"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/commit/7ced40c06c28d151e996a97045018c3559ae4707", "tags": ["x_refsource_MISC"], "url": "https://github.com/xmldom/xmldom/commit/7ced40c06c28d151e996a97045018c3559ae4707"}, {"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": ">= 0.9.0-beta.1, < 0.9.12", "status": "affected"}]}, {"vendor": "@xmldom", "product": "xmldom", "versions": [{"version": ">= 0.9.0-beta.1, < 0.9.12", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-01T14:36:23.638Z"}, "descriptions": [{"lang": "en", "value": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0-beta.1 until 0.9.12, HTML-mode parsing through DOMParser.parseFromString() mishandles a mixed-case closing tag for the script, style, textarea, or title raw-text elements. parseHtmlSpecialContent, selected by isHTMLRawTextElement or isHTMLEscapableRawTextElement, uses a case-sensitive indexOf() and then calls substring() with a missing-close result of negative one, causing unstable parser progression and quadratic output amplification. A small untrusted text/html document can consequently consume disproportionate CPU and memory when parsed and serialized. This issue is fixed in @xmldom/xmldom version 0.9.12."}], "source": {"advisory": "GHSA-6mj3-qw4j-hgrw", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-6mj3-qw4j-hgrw", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-01T15:29:51.387992Z", "id": "CVE-2026-83612", "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": "2026-09-01T15:30:10.060Z"}}]}}

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