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.
Metrics
Affected Vendors & Products
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OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.
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References
| Link | Providers |
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| https://github.com/adaltas/node-backmeup |
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History
Wed, 05 Aug 2026 13:30:00 +0000
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ssvc
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Wed, 05 Aug 2026 11:15:00 +0000
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| Description | 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. | |
| Title | backmeup (npm): OS Command Injection via Backup Option Values | |
| Weaknesses | CWE-78 | |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: TuranSec
Published:
Updated: 2026-08-05T12:50:55.058Z
Reserved: 2026-08-05T10:53:53.176Z
Link: CVE-2026-71243
Vulnrichment
Updated: 2026-08-05T12:50:51.656Z
NVD
No data.
Redhat
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OpenCVE Enrichment
Updated: 2026-08-05T13:00:16Z