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    "cveMetadata": {
        "cveId": "CVE-2026-117573",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-27T11:33:16.313Z",
        "datePublished": "2026-10-27T13:08:03.276Z",
        "dateUpdated": "2026-10-27T13:08:03.276Z"
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                "dateUpdated": "2026-10-27T13:08:03.276Z"
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            "datePublic": "2026-10-24T00:00:00.000Z",
            "title": "hagent through commit 761eec6 OS Command Injection via Arduino and ESP32 MCP Tools",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "hagent through commit 761eec6 contains an OS command injection vulnerability that allows MCP clients to execute shell commands by injecting metacharacters into the args parameter of the hagent_arduino and hagent_esp32 tools. Attackers or prompt-injected agents can supply crafted args interpolated into arduino-cli and idf.py commands run with subprocess.run(shell=True) to execute commands as the MCP server user."
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            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
                            "cweId": "CWE-78",
                            "type": "CWE"
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                    ]
                }
            ],
            "affected": [
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                    "vendor": "masc-ucsc",
                    "product": "hagent",
                    "defaultStatus": "unaffected",
                    "versions": [
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                            "version": "0",
                            "lessThanOrEqual": "761eec627a1e6fb128a2a8ce9245aa595cc2f7af",
                            "status": "affected",
                            "versionType": "git"
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                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.5,
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                        "scope": "UNCHANGED",
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                        "integrityImpact": "HIGH",
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                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/masc-ucsc/hagent/issues/98",
                    "tags": [
                        "issue-tracking"
                    ],
                    "name": "GitHub Issue #98"
                },
                {
                    "url": "https://github.com/masc-ucsc/hagent",
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                {
                    "url": "https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_arduino.py#L776",
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                    "url": "https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_esp32.py#L682",
                    "tags": [
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                    "name": "VulnCheck Advisory: hagent through commit 761eec6 OS Command Injection via Arduino and ESP32 MCP Tools",
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                    "url": "https://www.vulncheck.com/advisories/hagent-through-commit-761eec6-os-command-injection-via-arduino-and-esp32-mcp-tools"
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