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.
Published: 2026-10-23
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 23 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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'}


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

Updated: 2026-10-23T10:50:31.361Z

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
  • CWE-407

    Inefficient Algorithmic Complexity