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{"affected": [{"affectedData": [{"product": "xmldom", "vendor": "xmldom", "versions": [{"status": "affected", "version": ">= 0.9.10, < 0.9.12"}]}, {"product": "xmldom", "vendor": "@xmldom", "versions": [{"status": "affected", "version": ">= 0.9.10, < 0.9.12"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.10 until 0.9.12, the requireWellFormed: true serializer validates DocumentType.publicId and DocumentType.systemId with PubidLiteral_match and SystemLiteral_match expressions produced by reg() in lib/grammar.js, which inherit the multiline flag. A complete valid literal on the first line can therefore satisfy the matcher while U+000A, U+000D, U+2028, or U+2029 and breakout markup remain in the emitted <!DOCTYPE ...> declaration. This bypasses the strict-serialization mitigation for the earlier DocumentType injection advisory; creation and direct property assignment remain unvalidated by design. This issue is fixed in @xmldom/xmldom version 0.9.12."}], "id": "CVE-2026-83618", "lastModified": "2026-09-08T21:11:31.703", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "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:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-83618", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-04T01:58:55.616999Z", "version": "2.0.3"}}]}, "published": "2026-09-01T15:17:40.480", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/pull/1071"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/releases/tag/0.9.12"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-vr34-hp96-76pp"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-vr34-hp96-76pp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-91"}, {"lang": "en", "value": "CWE-625"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "xmldom: xmldom: DocumentType injection bypass via embedded line terminators", "id": "2526855", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526855"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-91", "details": ["A flaw was found in xmldom, a JavaScript XML parser and serializer module. A remote attacker could bypass the `requireWellFormed` strict-serialization mitigation for DocumentType injection by embedding line terminators within the `publicId` or `systemId` of a DocumentType declaration. This allows for the injection of arbitrary markup into the XML output, potentially leading to data manipulation or other security impacts depending on how the XML is processed."], "name": "CVE-2026-83618", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-console", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-01T14:49:46Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-83618\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-83618\nhttps://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362\nhttps://github.com/xmldom/xmldom/pull/1071\nhttps://github.com/xmldom/xmldom/releases/tag/0.9.12\nhttps://github.com/xmldom/xmldom/security/advisories/GHSA-vr34-hp96-76pp"], "threat_severity": "Important"}