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TI-2026-81175 Aliases CVE-2026-117573GHSA-j5hx-w574-wh9m

OS command injection in hagent Arduino and ESP32 MCP tools

Priority HIGH 72CWE-78Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

hagent through commit 761eec6 contains an OS command injection flaw in its MCP tools for Arduino and ESP32. The args parameter of the hagent_arduino and hagent_esp32 tools is interpolated into arduino-cli and idf.py commands run with shell enabled, so shell metacharacters are not neutralized (CWE-78). A local user with low privileges, or a prompt-injected agent, can supply crafted args to execute commands as the MCP server user.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00701 53rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

Remediation

The sources list no fixed version for hagent.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117573
  2. 2026-10-27 Alias added: GHSA-j5hx-w574-wh9m
  3. 2026-10-28 Priority changed: MEDIUM → LOW
  4. 2026-11-02 CISA SSVC decision points changed
  5. 2026-11-02 Priority changed: LOW → HIGH

References

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences