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

> Attackers can execute arbitrary commands via prototype pollution in the systeminformation npm package when processing service parameters.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4v2w-h9jm-mqjg

## What is CVE-2020-26245?

CVE-2020-26245 is a high-severity command injection vulnerability in sebhildebrandt systeminformation, published on 27 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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().

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-471 (Modification of Assumed-Immutable Data (MAID))

## Which versions are affected by CVE-2020-26245?

2 open source packages ship an affected version, including systeminformation. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `systeminformation` | npm | All versions | 4.30.5 |
| `systeminformation` | npm | All versions | 4.30.5 |

Products: Systeminformation Systeminformation.

## How do I fix CVE-2020-26245?

Upgrade systeminformation to 4.30.5 or later.

## Is CVE-2020-26245 being exploited?

There is no known exploitation of CVE-2020-26245 in the wild and no public exploit code.

## Other vulnerabilities in sebhildebrandt systeminformation

- [CVE-2023-42810](https://insights.sbomify.com/CVE-2023-42810/): systeminformation SSID Command Injection Vulnerability (critical 9.8)
- [CVE-2021-21388](https://insights.sbomify.com/CVE-2021-21388/): Command Injection Vulnerability in systeminformation (high 8.9)
- [CVE-2026-26318](https://insights.sbomify.com/CVE-2026-26318/): systeminformation has Command Injection via Unsanitized `locate` Output in `versions()` (high 8.8)
- [CVE-2020-7752](https://insights.sbomify.com/CVE-2020-7752/): Command Injection (high 8.8)
- [CVE-2026-50289](https://insights.sbomify.com/CVE-2026-50289/): systeminformation: OS command injection in networkInterfaces() via interfaces(5) source-directive path on Linux (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-26245 and fix it if it is affected.

What it is: CVE-2020-26245 is a high-severity command injection vulnerability in sebhildebrandt systeminformation, published on 27 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-26245 in the wild and no public exploit code.

Affected packages and fixed versions:
- systeminformation (npm): affected all versions; fixed in 4.30.5
- systeminformation (npm): affected all versions; fixed in 4.30.5

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-26245/ (Markdown: https://insights.sbomify.com/CVE-2020-26245/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-26245
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-26245
- OSV: https://osv.dev/vulnerability/CVE-2020-26245

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-26245/
Summaries are generated and may contain mistakes; the official description above is the record.