Bug 2559538 (CVE-2026-16762)

Summary: CVE-2026-16762 qt: qt: Denial of Service via crafted XML parsing in QXmlStreamReader
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Qt. An unauthenticated remote attacker could exploit this vulnerability by submitting a specially crafted XML document to an application utilizing the QXmlStreamReader parser, causing disproportionate processor consumption during parsing. This issue leads to a Denial of Service (DoS), rendering the affected application unresponsive.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-23 11:02:48 UTC 
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.