Bug 2555583

Summary: CVE-2026-106583 openssh: openssh: Command injection via unvalidated command-line username [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: opensshAssignee: Dmitry Belyavskiy <dbelyavs>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: low    
Version: rawhideCC: crypto-team, dbelyavs, dwalsh, jjelen, mattias.ellert, tm
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---Flags: fedora-admin-xmlrpc: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b9eddfee-2c17-4948-819e-0edf142d3610"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2547243, 2553034    

Description Ganesh 2026-10-19 13:42:34 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.

In ssh in OpenSSH before 10.6, a $ or \ character can occur in a command-line username, leading to injection.
Comment 1 Ganesh 2026-10-19 15:42:24 UTC 
*** Bug 2553371 has been marked as a duplicate of this bug. ***