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.

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Fri, 23 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Denial-of-service vulnerability in the Qt Core QXmlStream parser (QXmlStreamReader) impacts Qt
First Time appeared Qt
Qt qt
Qt qtbase
Weaknesses CWE-407
CPEs cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
Qt qtbase
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published:

Updated: 2026-10-23T10:56:05.830Z

Reserved: 2026-07-23T14:05:09.271Z

Link: CVE-2026-16762

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-23T09:17:06.647

Modified: 2026-10-23T09:17:06.647

Link: CVE-2026-16762

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T10:30:09Z

Weaknesses