CVE-2026-5029

A remote code execution vulnerability exists in Code Runner MCP Server when run with the --transport http option, which exposes the /mcp JSON-RPC endpoint without authentication on port 3088. An unauthenticated remote attacker can invoke the run-code MCP tool to supply arbitrary source code and execute it via child_process.exec() using the specified language interpreter. This allows execution of arbitrary code with the privileges of the user running the server. This vulnerability has not been fixed and might affect the project in all versions.

CVSS

No CVSS.

References

Link	Resource
https://cert.pl/en/posts/2026/05/CVE-2026-5029

Configurations

No configuration.

History

12 May 2026, 10:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 10:16

Updated : 2026-05-12 14:15

NVD link : CVE-2026-5029

Mitre link : CVE-2026-5029

CVE.ORG link : CVE-2026-5029

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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