Bug 2496824

Summary: CVE-2026-44291 qt5-qtwebengine: protobufjs: Arbitrary Code Execution via prototype pollution [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Hardik Vyas <hvyas>
Component: qt5-qtwebengineAssignee: Jan Grulich <jgrulich>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: jgrulich, kde-sig, kevin
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["c76ce858-7eaa-4055-8c17-3736dd38ef60"]}
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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: 2477111    

Description Hardik Vyas 2026-07-03 12:40:23 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.

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. This vulnerability is fixed in 7.5.6 and 8.0.2.