Bug 2526163

Summary: CVE-2026-81624 moditect: undertow: WebSocketContainer defaults for buffers and timeouts are infinite [fedora-all]
Product: [Fedora] Fedora Reporter: Abhishek Raj <abhraj>
Component: moditectAssignee: Marián Konček <mkoncek>
Status: NEW --- QA Contact:
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Priority: high    
Version: rawhideCC: mizdebsk, mkoncek
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
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Whiteboard: {"flaws": ["73d792f7-33b4-421c-a145-4d91c988022b"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2524868    

Description Abhishek Raj 2026-08-31 08:28:22 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.

A vulnerability was found in Undertow where the WebSocketContainer and its boot process do not allow setting the binaryBuffer and textBuffer sizes, along with session duration and async send timeout. These parameters default to infinite. This is a follow-up to CVE-2026-5680, as the initial fix allowed setting buffer sizes for certain types but left async send and session duration as infinite and inaccessible for configuration. An attacker could exploit these infinite defaults to cause resource exhaustion or an Out of Memory (OOME) condition on the server.