{"id":"CVE-2026-16762","title":"Denial-of-service vulnerability in the Qt Core QXmlStream parser (QXmlStreamReader) impacts Qt","summary":"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 tha…","severity":"high","cvss":8.7,"cvssVector":"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/S:P/AU:Y/R:A/RE:L","cvssSource":"cna","cwe":["CWE-407"],"vendor":"qt","product":"qt","affected":["qt >= 4.3.0 < 6.8.9","qt >= 6.9.0 < 6.11.2"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-23T10:43:53.436456Z"},"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T10:56:05.830Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-16762","references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-16762:"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/738885"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/738901"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T09:20:44.055Z","slug":"CVE-2026-16762","body":"## Overview\n\nAn 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.\n\n## Affected\n\n- `qt >= 4.3.0 < 6.8.9`\n- `qt >= 6.9.0 < 6.11.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}