HighVulnerability

CVE-2026-117573: hagent OS command injection through args in arduino and esp32 MCP tools

Source: NVD(opens in a new tab)
Identifier: CVE-2026-117573
Published: October 27, 2026
Record updated: October 27, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.

Summary

hagent through commit 761eec6 contains an OS command injection flaw in the args parameter of the hagent_arduino and hagent_esp32 tools. Crafted args are interpolated into arduino-cli and idf.py commands run with subprocess.run(shell=True), so MCP clients, or prompt-injected agents, can execute shell commands as the MCP server user.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 7.8(high)
CVSS vector: 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
EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 27, 2026.
Disclosure date: October 27, 2026

Weaknesses and techniques

Weakness (CWE): CWE-78
Attack pattern (CAPEC): CAPEC-88
AI threat technique (MITRE ATLAS): AML.T0010

Classification

Attack type: Supply chain,
Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-117573

First tracked: October 27, 2026 at 02:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Topics

Model Context Protocol

Summary

Mitigation

Topics

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