CVE-2026-7730
CVE-2026-7730 is a medium-severity vulnerability with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Medium (CVSS 3.x base score 6.3)
- CVSS v2: 6.5
- CVSS v4: 2.1
- EPSS exploit prediction: 1% (61st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26884
- Weakness: CWE-77
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-7730?
- CVE-2026-7730 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2026-7730 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-7730?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-7730 have an EU (EUVD) identifier?
- Yes. CVE-2026-7730 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26884.
- When was CVE-2026-7730 published?
- CVE-2026-7730 was published on 2026-05-04 and last updated on 2026-06-17.
References
- https://github.com/BruceJqs/public_exp/issues/37
- https://github.com/privsim/mcp-test-runner/
- https://github.com/privsim/mcp-test-runner/issues/24
- https://vuldb.com/submit/807541
- https://vuldb.com/vuln/360905
- https://vuldb.com/vuln/360905/cti
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