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Back to active CVEs
High · CVSS 8.5CVE-2026-108953

mac-shell-mcp before 2.0.0 OS Command Injection via execute_command ArgumentsCVE-2026-108953

Answer in brief

CVE-2026-108953 records a High severity (CVSS 8.5) vulnerability in mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments. The current sources do not mark it as known exploited. The current feed maps cfdude/mac-shell-mcp (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 12, 2026Updated Oct 12, 2026Source checked Oct 12, 2026First seen by HOL Oct 12, 2026Material review Oct 12, 2026
Upstream Advisory

Record context

Vulnerability class
Command Injection
EPSS
Not reported
CWE IDs
CWE-78
Source
CVE List V5
Source checked
Oct 12, 2026
References
5 linked sources
Open source record

Key facts

Risk
High · CVSS 8.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps cfdude/mac-shell-mcp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
cfdude/mac-shell-mcpgeneric>=0 <2.0.02.0.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for cfdude/mac-shell-mcp.
  2. 2Review the reported fix. Update cfdude/mac-shell-mcp to 2.0.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 12, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

mac-shell-mcp before 2.0.0 contains an OS command injection vulnerability that allows MCP clients to bypass the command whitelist by injecting shell metacharacters into execute_command arguments. Attackers or malicious prompts can call a safe command such as pwd with arguments like ';' to run forbidden commands as the server user without approval.

Quoted source text, attributed separately from HOL analysis.

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