RCE in Privsim Mcp-Test-Runner
CVE-2026-7730
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.018 (78.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.018 · change: +0.007
Affected products
- Privsim Mcp-Test-Runner — versions 0.2.0
Weakness classification (CWE)
References
- vuldb.com/vuln/360905 (technical-description, vdb-entry)
- vuldb.com/vuln/360905/cti (signature, permissions-required)
- vuldb.com/submit/807541 (third-party-advisory)
- github.com/privsim/mcp-test-runner/issues/24 (issue-tracking)
- github.com/BruceJqs/public_exp/issues/37 (issue-tracking, exploit)
- github.com/privsim/mcp-test-runner/ (product)
Frequently asked questions
- What is CVE-2026-7730?
- CVE-2026-7730 is a medium-severity vulnerability in Privsim Mcp-Test-Runner, classified under Command Injection. CVSS score: 6.3/10. Published 2026-05-04.
- How severe is CVE-2026-7730?
- Medium severity. CVSS v3 base score is 6.3 out of 10.