Bug 2547243 (CVE-2026-106583)

Summary: CVE-2026-106583 openssh: openssh: Command injection via unvalidated command-line username
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: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenSSH. The OpenSSH client insufficiently sanitizes command-line usernames containing special characters, such as dollar signs and backslashes. When untrusted input is passed to the client command line, an attacker can exploit this issue to perform command injection through shell-evaluated options such as ProxyCommand, potentially leading to arbitrary command execution.
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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: 2555581, 2555583    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-06 23:51:22 UTC
In ssh in OpenSSH before 10.6, a $ or \ character can occur in a command-line username, leading to injection.