Bug 2526428

Summary: CVE-2026-59725 qt6-qtwebengine: Socket.IO: Denial of Service via invalid binary POST requests [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Avinash Hanwate <ahanwate>
Component: qt6-qtwebengineAssignee: Troy Dawson <tdawson>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: jgrulich, kde-sig, tdawson
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["212e7e06-6408-4723-9394-08079143c9a7"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2498118    

Description Avinash Hanwate 2026-08-31 17:53:07 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Socket.IO enables bidirectional and low-latency communication for every platform. From 4.1.0 before 6.6.7, Engine.IO protocol v4 polling transport does not properly close the HTTP response for invalid binary POST requests with Content-Type: application/octet-stream, allowing an unauthenticated attacker to exhaust server-side connections and sockets. This issue is fixed in version 6.6.7.