---
title: "CVE-2026-117573: hagent - Command Injection"
description: "hagent through commit 761eec6 contains a command injection caused by unsanitized args parameter in hagent_arduino and hagent_esp32 tools, letting attackers execute shell commands as MCP server user, exploit requires attacker to supply crafted args."
url: https://panop.io/threat-heartbeat/CVE-2026-117573/
---

# CVE-2026-117573 hagent - Command Injection

hagent through commit 761eec6 contains a command injection caused by unsanitized args parameter in hagent\_arduino and hagent\_esp32 tools, letting attackers execute shell commands as MCP server user, exploit requires attacker to supply crafted args.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.70% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-117573)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

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

Published

27 October 2026

Updated

29 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to a version after commit 761eec6 that sanitizes input or apply patches to validate args parameter.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-117573](https://nvd.nist.gov/vuln/detail/CVE-2026-117573)
- [https://github.com/masc-ucsc/hagent](https://github.com/masc-ucsc/hagent)
- [https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp\_arduino.py#L776](https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_arduino.py#L776)
- [https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp\_esp32.py#L682](https://github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_esp32.py#L682)
- [https://github.com/masc-ucsc/hagent/issues/98](https://github.com/masc-ucsc/hagent/issues/98)
- [https://www.vulncheck.com/advisories/hagent-through-commit-761eec6-os-command-injection-via-arduino-and-esp32-mcp-tools](https://www.vulncheck.com/advisories/hagent-through-commit-761eec6-os-command-injection-via-arduino-and-esp32-mcp-tools)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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