CVE-2026-4199
CVE-2026-4199 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. 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-74.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 4.3
- CVSS v4: 1.9
- EPSS exploit prediction: 1% (46th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12269
- Weakness: CWE-74
- Published:
- Last modified:
Description
A vulnerability was identified in bazinga012 mcp_code_executor up to 0.3.0. Affected by this issue is the function installDependencies of the file src/index.ts. Such manipulation leads to command injection. The attack can only be performed from a local environment. The exploit is publicly available and might be used. It is best practice to apply a patch to resolve this issue. The project was informed of the problem early through an issue report but has not responded yet.
Frequently asked questions
- What is CVE-2026-4199?
- A vulnerability was identified in bazinga012 mcp_code_executor up to 0.3.0. Affected by this issue is the function installDependencies of the file src/index.ts. Such manipulation leads to command injection. The attack can only be performed from a local environment. The exploit is publicly available and might be used. It is best practice to apply a patch to resolve this issue. The project was informed of the problem early through an issue report but has not responded yet.
- How severe is CVE-2026-4199?
- CVE-2026-4199 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2026-4199 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-4199?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-4199 have an EU (EUVD) identifier?
- Yes. CVE-2026-4199 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12269.
- When was CVE-2026-4199 published?
- CVE-2026-4199 was published on 2026-03-16 and last updated on 2026-06-17.
References
- https://github.com/bazinga012/mcp_code_executor/
- https://github.com/bazinga012/mcp_code_executor/issues/17
- https://github.com/bazinga012/mcp_code_executor/pull/18/commits/a94ec2fea318597646ba1c44d8e44eb1c9196d20
- https://github.com/user-attachments/files/25931133/mcp_code_executor_security_advisory.pdf
- https://vuldb.com/?ctiid.351111
- https://vuldb.com/?id.351111
- https://vuldb.com/?submit.770424
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