HighVulnerabilityLLM-specific

CVE-2026-108953: mac-shell-mcp OS command injection through execute_command arguments

Source: NVD(opens in a new tab)
Identifier: CVE-2026-108953
Published: October 12, 2026
Record updated: October 12, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.

Summary

mac-shell-mcp before 2.0.0 contains an OS command injection flaw in its execute_command arguments. Attackers or malicious prompts can pass shell metacharacters, such as ';' after a whitelisted command like pwd, to run forbidden commands as the server user without approval, bypassing the command whitelist.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 7.8(high)
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector: local
Attack complexity: low
Privileges required: low
User interaction: none
EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 12, 2026.
Disclosure date: October 12, 2026

Weaknesses and techniques

Weakness (CWE): CWE-78
Attack pattern (CAPEC): CAPEC-88
AI threat technique (MITRE ATLAS): AML.T0054

Classification

Attack type: Jailbreak,
Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-108953

First tracked: October 12, 2026 at 02:07 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Topics

Model Context Protocol

Summary

Mitigation

Topics

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