CVE-2026-117573
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductMasc-ucsc Hagent
PublishedOct 27, 2026
First seenOct 27, 2026
Weakness typeCWE-78OS command injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| masc-ucsc hagent | v ≤ 761eec627a1e6fb128a2a8ce9245aa595cc2f7af | — |
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