CVE-2026-5029General

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

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0.0/ 10 priority

Sources & remediation

Other references

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

Weakness type (CWE)

CWE-306

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
General: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

General

1100.0%

Referenced assets2 URLs

By indicator

Full discourse1 post

Vulmon Vulnerability Feed@VulmonFeeds149d
General
CVE-2026-5029 Unauthenticated Remote Code Execution in Code Runner MCP Server HT... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-5029 Vulnerability Alert Subscriptions: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=1
Post summary
A brief alert announces CVE‑2026‑5029, noting an unauthenticated RCE in Code Runner MCP Server and linking to a vulnerability details page, but it offers no exploitation, mitigation, or false‑positive information.
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