RCE in Adaltas Backmeup
CVE-2026-71243
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.003 (21.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Adaltas Backmeup — versions 0
Weakness classification (CWE)
References
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
Frequently asked questions
- What is CVE-2026-71243?
- CVE-2026-71243 is a high-severity vulnerability in Adaltas Backmeup, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-05.
- How severe is CVE-2026-71243?
- High severity. CVSS v3 base score is 8.8 out of 10.