CVE-2026-83607

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{"affected": [{"affectedData": [{"product": "xmldom", "vendor": "xmldom", "versions": [{"status": "affected", "version": "<= 0.6.0"}]}, {"product": "xmldom", "vendor": "@xmldom", "versions": [{"status": "affected", "version": ">= 0.7.0, < 0.8.14"}, {"status": "affected", "version": ">= 0.9.0, < 0.9.11"}]}], "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. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Document.createElement(tagName) stores an unvalidated element name and XMLSerializer.serializeToString() emits that name verbatim. The requireWellFormed: true path did not validate the element qualified name or synthesized xmlns:PREFIX declaration, so attacker-controlled tag names could inject attributes, elements, or processing instructions into serialized XML or HTML and could cause cross-site scripting when browser-consumed. The unchecked values violate the XML QName constraint, and default serialization and creation-time createElement() behavior remain permissive. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom."}], "id": "CVE-2026-83607", "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-2026-83607", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-01T15:28:20.162507Z", "version": "2.0.3"}}]}, "published": "2026-09-01T15:17:38.650", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/commit/cba1321218b069182695813fa7565653708e172e"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/commit/d8212e632507eaf1d9f609657dd4c56abeb12d44"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/pull/1043"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/pull/1050"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/releases/tag/0.8.14"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/releases/tag/0.9.11"}, {"source": "security-advisories@github.com", "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-w2rr-34g9-rvrj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-w2rr-34g9-rvrj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-91"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "xmldom: xmldom: Cross-site scripting via unvalidated element name injection", "id": "2526817", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526817"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["A flaw was found in xmldom, a JavaScript module for parsing and serializing XML. This vulnerability allows a remote attacker to inject malicious content, such as attributes or elements, into serialized XML or HTML documents. This occurs because the `Document.createElement()` function does not properly validate element names, and the `XMLSerializer.serializeToString()` function then outputs these unvalidated names directly. When these manipulated documents are processed by a web browser, it can lead to cross-site scripting (XSS), enabling attackers to execute arbitrary scripts in the user's browser."], "name": "CVE-2026-83607", "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": "2026-09-01T14:23:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-83607\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-83607\nhttps://github.com/xmldom/xmldom/commit/cba1321218b069182695813fa7565653708e172e\nhttps://github.com/xmldom/xmldom/commit/d8212e632507eaf1d9f609657dd4c56abeb12d44\nhttps://github.com/xmldom/xmldom/pull/1043\nhttps://github.com/xmldom/xmldom/pull/1050\nhttps://github.com/xmldom/xmldom/releases/tag/0.8.14\nhttps://github.com/xmldom/xmldom/releases/tag/0.9.11\nhttps://github.com/xmldom/xmldom/security/advisories/GHSA-w2rr-34g9-rvrj"], "threat_severity": "Important"}

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