Bug 2562812 (CVE-2026-114278)

Summary: CVE-2026-114278 che-machine-exec: Unauthenticated Command Injection via kubeconfig Username in che-machine-exec
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: sdawley
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in che-machine-exec. The service improperly sanitizes user-supplied input when constructing shell commands from configuration endpoints. An unauthenticated remote attacker can exploit this vulnerability by submitting crafted network requests, leading to arbitrary code execution within the affected containers.
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Description OSIDB Bzimport 2026-10-28 12:01:51 UTC 
The che-machine-exec service constructs a shell command by concatenating user-controlled input (the username and namespace fields from the /exec/init and /exec/config JSON endpoints) into a double-quoted sh -c "echo "..." > ..." invocation without any escaping. When che-machine-exec is run with authentication disabled (its default), any network-reachable attacker can achieve remote code execution in containers che-machine-exec is configured to access, via shell command substitution ($(...) or backticks).