CVE Explorer

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 fi

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:26888322073c2182a93e0e696de6106b7fcfca9b13becc0b6e1ead6c3b4f9431

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"collectionURL":"https://github.com","defaultStatus":"affected","packageName":"mcp-server-code-runner","product":"Code Runner MCP Server","repo":"https://github.com/formulahendry/mcp-server-code-runner","vendor":"Code Runner MCP Server","versions":[{"lessThanOrEqual":"*","status":"affected","version":"0","versionType":"custom"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:a6aadd748a217dc59201cfa72c0096e5c270bcc240631011435e7210fc905401 · sha256:25795ae5559926cd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HI…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:a6aadd748a217dc59201cfa72c0096e5c270bcc240631011435e7210fc905401 · sha256:25795ae5559926cd… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-306","description":"CWE-306 Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:a6aadd748a217dc59201cfa72c0096e5c270bcc240631011435e7210fc905401 · sha256:25795ae5559926cd… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["third-party-advisory"],"url":"https://cert.pl/en/posts/2026/05/CVE-2026-5029"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:a6aadd748a217dc59201cfa72c0096e5c270bcc240631011435e7210fc905401 · sha256:25795ae5559926cd… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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