Arbitrary command execution via blacklist bypass
Published Jan 7, 2026 · Updated Jan 7, 2026
Command injection in terminal-controller-mcp 0.1.7 allows remote attackers to execute arbitrary commands through the execute_command MCP tool. The function checks the literal command string against a short blacklist, while shell substitution can reconstruct blocked command names after validation. Access to the MCP tool is sufficient to run commands with the file-system permissions of the server process, affecting confidentiality, integrity, and availability.
Summary
What happened
Command injection in terminal-controller-mcp 0.1.7 allows remote attackers to execute arbitrary commands through the execute_command MCP tool. The function checks the literal command string against a short blacklist, while shell substitution can reconstruct blocked command names after validation. Access to the MCP tool is sufficient to run commands with the file-system permissions of the server process, affecting confidentiality, integrity, and availability.
The record
- CVE
- CVE-2025-61492
- Published
- Jan 7, 2026
- Updated
- Jan 7, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-77, T1059
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 7, 2026CVE publishedPublication date reported by the CVE source.
- Jan 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- execute_command blacklist bypass proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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