Bug 2539978

Summary: CVE-2026-97152 nanomsg: Nanomsg: Buffer overflow via unchecked WebSocket header copy [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vladimir Vasilev <vvasilev>
Component: nanomsgAssignee: Scott K Logan <logans>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: urgent Docs Contact:
Priority: urgent    
Version: epel10CC: logans
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["ae0e5e54-49b3-4055-b618-81ef571006db"]}
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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: 2539915    

Description Vladimir Vasilev 2026-09-24 07:56:12 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.

Nanomsg versions 0.5-beta through 1.x before 1.2.3 has a remotely exploitable buffer overflow in the WebSocket transport, due to an unchecked copy of the Sec-WebSocket-Version header, through snprintf.