Bug 2571852 (CVE-2026-65843)

Summary: CVE-2026-65843 sync-rpc: sync-rpc: Arbitrary code execution via exposed communication port
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in sync-rpc. This vulnerability allows an unauthenticated remote attacker to achieve arbitrary code execution on the host server. When the communication port used by sync-rpc's background process is exposed and not blocked by a firewall, an attacker who identifies the active port can trigger the application to load and execute arbitrary JavaScript files stored on the system.
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Description OSIDB Bzimport 2026-11-11 18:41:29 UTC 
sync-rpc runs asynchronous commands synchronously by putting them in a separate proces. Prior to version 1.3.7, if an attacker could guess the correct port and it was not blocked via a firewall, it was possible to load and execute arbitrary JavaScript files stored on the server running sync-rpc. This issue has been patched in version 1.3.7.