CVE-2026-117573

HIGH 7.8

hagent through commit 761eec6 OS Command Injection via Arduino and ESP32 MCP Tools

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78
Vendor	masc-ucsc
Product	hagent
Published	Oct 27, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

masc-ucsc / hagent

0 ≤ 761eec627a1e6fb128a2a8ce9245aa595cc2f7af

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/masc-ucsc/hagent/issues/98 github.com: https://github.com/masc-ucsc/hagent github.com: https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_arduino.py#L776 github.com: https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_esp32.py#L682 vulncheck.com: https://www.vulncheck.com/advisories/hagent-through-commit-761eec6-os-command-injection-via-arduino-and-esp32-mcp-tools