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TI-2026-81171 Aliases CVE-2026-117567GHSA-3w6w-vpcf-fv9h

OS command injection in esp-mcp via MCP tool parameters

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

esp-mcp through commit 28afddf contains an OS command injection flaw in which shell metacharacters supplied in MCP tool parameters are passed to a shell command. An attacker who can influence agent tool calls through prompt injection can inject metacharacters into the target, port, project_path, or project_name values, which run as the MCP server user with local low-privilege access required. CWE-78 applies.

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

Description from the CNA

esp-mcp through commit 28afddf contains an OS command injection vulnerability that allows attackers to run arbitrary commands by supplying shell metacharacters in MCP tool parameters. Attackers influencing agent tool calls through prompt injection can inject metacharacters into target, port, project_path, or project_name values passed to asyncio.create_subprocess_shell, executing commands as the MCP server user.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00652 51st 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 esp-mcp.

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

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117567
  2. 2026-10-27 Alias added: GHSA-3w6w-vpcf-fv9h
  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 3

Sources

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