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CVE-2026-117573

7.8, high

Masc-ucsc hagent OS Command Injection Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
0.7% higher than 53% of scored CVEs
Exploitation
No public evidence
Published
27 Oct 20262 days ago

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.

Details

Vendor
Masc-ucsc
Product
hagent
Weakness
CWE-78 (opens in a new tab)
Status
Deferred
Updated
27 Oct 2026
Assigner
disclosure@vulncheck.com

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

References 5

Other references 5

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Beyond this page

Is CVE-2026-117573 in your network?

This page tells you how dangerous CVE-2026-117573 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Find it before attackers do

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 29 Oct 2026, not the live upstream state.