HIGH

CVE-2026-108953

CVSS v3

7.8

HIGH

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-108953 yet.

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2026-10-12
Last Modified: 2026-10-12

Frequently asked questions

What is CVE-2026-108953?

Is CVE-2026-108953 actively exploited?

Active exploitation of CVE-2026-108953 has not been confirmed.

What is the CVSS score for CVE-2026-108953?

CVE-2026-108953 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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