CVE-2026-50289: systeminformation: OS command injection in networkInterfaces() via interfaces(5) source-directive path on Linux

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-07-17 · updated 2026-10-24
Weakness: CWE-78

Description

systeminformation is a System and OS information library for node.js. Prior to 5.31.7, networkInterfaces() on Linux is vulnerable to OS command injection through the Debian/Ubuntu interfaces(5) source directive because lib/network.js checkLinuxDCHPInterfaces() reads /etc/network/interfaces, extracts a source <path> token from file content, and interpolates it unquoted into cat ${file} 2> /dev/null | grep 'iface\|source' executed by execSync(cmd, util.execOptsLinux), allowing a path containing shell metacharacters to execute commands in any process that calls networkInterfaces(), including via getStaticData() and getAllData(). This issue is fixed in version 5.31.7.

Affected products

sebhildebrandt systeminformation: before 5.31.7 — fixed in 5.31.7

How to fix

Upgrade to a fixed version: sebhildebrandt systeminformation 5.31.7. Check the vendor advisory for mitigations.

References

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