{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-16762", "assignerOrgId": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "state": "PUBLISHED", "assignerShortName": "Qt", "dateReserved": "2026-07-23T14:05:09.271Z", "datePublished": "2026-10-23T08:58:40.028Z", "dateUpdated": "2026-10-23T10:56:05.830Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "shortName": "Qt", "dateUpdated": "2026-10-23T08:58:40.028Z" }, "title": "Denial-of-service vulnerability in the Qt Core QXmlStream parser (QXmlStreamReader) impacts Qt", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-407", "description": "CWE-407 Inefficient Algorithmic Complexity", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-229", "descriptions": [ { "lang": "en", "value": "CAPEC-229 Serialized Data Parameter Blowup" } ] } ], "affected": [ { "vendor": "qt", "product": "qt", "modules": [ "qtbase" ], "versions": [ { "status": "unknown", "version": "0", "lessThan": "4.3.0", "versionType": "python" }, { "status": "affected", "version": "4.3.0", "lessThan": "6.8.9", "versionType": "python" }, { "status": "affected", "version": "6.9.0", "lessThan": "6.11.2", "versionType": "python" } ], "defaultStatus": "unaffected" } ], "cpeApplicability": [ { "operator": "OR", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3.0", "versionEndExcluding": "6.8.9" }, { "vulnerable": true, "criteria": "cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9.0", "versionEndExcluding": "6.11.2" }, { "vulnerable": true, "criteria": "cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3.0", "versionEndExcluding": "6.8.9" }, { "vulnerable": true, "criteria": "cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9.0", "versionEndExcluding": "6.11.2" } ] } ] } ], "descriptions": [ { "lang": "en", "value": "An attacker able to supply a crafted XML document to an application using QXmlStreamReader can cause disproportionate CPU consumption during parsing, making the application unresponsive (denial of service). Exploitation requires only that the application parse attacker-influenced XML; no authentication, privileges, or user interaction beyond ingesting the input are needed. There is no loss of confidentiality or integrity — no data disclosure, data modification, or code execution — and the impact is contained to the affected process.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "
An attacker able to supply a crafted XML document to an application using QXmlStreamReader can cause disproportionate CPU consumption during parsing, making the application unresponsive (denial of service). Exploitation requires only that the application parse attacker-influenced XML; no authentication, privileges, or user interaction beyond ingesting the input are needed. There is no loss of confidentiality or integrity — no data disclosure, data modification, or code execution — and the impact is contained to the affected process.