{"id":"CVE-2026-117573","published":"2026-10-27T14:16:39.800","lastModified":"2026-10-27T16:04:22.707","description":"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.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-78"],"vendors":[],"products":[],"references":[{"url":"https://github.com/masc-ucsc/hagent","tags":[]},{"url":"https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_arduino.py#L776","tags":[]},{"url":"https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_esp32.py#L682","tags":[]},{"url":"https://github.com/masc-ucsc/hagent/issues/98","tags":[]},{"url":"https://www.vulncheck.com/advisories/hagent-through-commit-761eec6-os-command-injection-via-arduino-and-esp32-mcp-tools","tags":[]}],"exploitRefs":[{"url":"https://github.com/masc-ucsc/hagent","tags":[]},{"url":"https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_arduino.py#L776","tags":[]},{"url":"https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_esp32.py#L682","tags":[]},{"url":"https://github.com/masc-ucsc/hagent/issues/98","tags":[]}],"hasPoc":true,"ai":null}