CVE-2026-117573 hagent through commit 761eec6 OS Command Injection via Arduino and ESP32 MCP Tools
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-117573?
CVE-2026-117573 is a high-severity vulnerability in masc-ucsc hagent, published on 27 Oct 2026.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2026-117573?
How do I fix CVE-2026-117573?
No fix has been published for CVE-2026-117573 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-117573 being exploited?
There is no known exploitation of CVE-2026-117573 in the wild and no public exploit code.
Sources
Also known as GHSA-j5hx-w574-wh9m.