{"id":"CVE-2026-71243","summary":"backmeup (npm): OS Command Injection via Backup Option Values","details":"The backmeup npm package assembles shell command strings by directly concatenating its option values (name, source, destination, filter) - e.g. cmd = \"mkdir -p \" + path.join(info.destination, info.name) + \"; \" - and executes the resulting string through a shell via ssh2-exec (locally via child_process, or remotely via SSH when an ssh handle is supplied), rather than using execFile/spawn with an argument array. The only processing applied is path.normalize()/path.join(), which do not neutralize shell metacharacters (;, |, &, $(), backticks, newline). Any application that passes attacker-influenced values into these options (e.g. a user-chosen backup name) is vulnerable to arbitrary OS command execution on the backup host, or on the remote SSH target when one is configured.","modified":"2026-08-07T03:45:21.039994588Z","published":"2026-08-05T10:56:48.404Z","database_specific":{"cna_assigner":"TuranSec","cwe_ids":["CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71243.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71243.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71243"},{"type":"PACKAGE","url":"https://github.com/adaltas/node-backmeup"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/adaltas/node-backmeup","events":[{"introduced":"0"},{"last_affected":"db4d5572b23ab06c2ba564d48cdeca282e9d3fd5"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"0.0.2"}]}}],"versions":["v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71243.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}