Bug 2454500 (CVE-2026-35388)

Summary: CVE-2026-35388 OpenSSH: OpenSSH: Low integrity impact from unconfirmed proxy-mode multiplexing sessions
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: adudiak, kshier, stcannon, teagle, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in OpenSSH. This vulnerability allows for a low integrity impact due to the omission of connection multiplexing confirmation for proxy-mode multiplexing sessions. A local user, under specific and complex conditions requiring user interaction, could potentially establish a multiplexed session without explicit confirmation, leading to unintended data handling.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2454951    
Bug Blocks:    

Description OSIDB Bzimport 2026-04-02 18:02:25 UTC
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.