CVE-2026-26029

HighRCE

Published: 11 February 2026

Published

11 February 2026

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score 0.0003 8.0th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-26029 is a high-severity OS Command Injection (CWE-78) vulnerability. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked at the 8.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

This vulnerability is AI-related — categorised as APIs and Models; in the Protocol-Specific Risks risk domain.

Threat & Defense at a Glance

What attackers do: exploitation maps to Command and Scripting Interpreter (T1059) and 1 other technique.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications

addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation

addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

MITRE ATT&CK Enterprise TechniquesAI

T1059 Command and Scripting Interpreter Execution

Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.

attack.mitre.org →

T1203 Exploitation for Client Execution Execution

Adversaries may exploit software vulnerabilities in client applications to execute code.

attack.mitre.org →

Why these techniques?

Command injection via unsafe child_process.exec enables arbitrary shell command execution (T1059); client-side desktop app with UI:R requirement maps to exploitation for client execution (T1203).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

sf-mcp-server is an implementation of Salesforce MCP server for Claude for Desktop. A command injection vulnerability exists in sf-mcp-server due to unsafe use of child_process.exec when constructing Salesforce CLI commands with user-controlled input. Successful exploitation allows attackers to execute arbitrary…

shell commands with the privileges of the MCP server process.

Deeper analysisAI

CVE-2026-26029 is a command injection vulnerability (CWE-78) in sf-mcp-server, an implementation of the Salesforce MCP server for Claude for Desktop. The flaw arises from the unsafe use of child_process.exec when constructing Salesforce CLI commands that incorporate user-controlled input, enabling attackers to inject and execute arbitrary shell commands with the privileges of the MCP server process. The vulnerability has a CVSS v3.1 base score of 7.5 (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H), rated as high severity.

Attackers can exploit this vulnerability remotely over the network without requiring privileges, though it demands high attack complexity and user interaction, such as tricking a user into providing malicious input through the application's interface. Successful exploitation grants attackers the ability to execute arbitrary shell commands under the context of the MCP server process, potentially leading to high confidentiality, integrity, and availability impacts, including data theft, modification, or system compromise on the host running the server.

Mitigation details are available in the project's GitHub security advisories (GHSA-h4w9-g9c5-vfwq) and a related patch commit (99fba0171b8c22b5ee3c0405053ccfd2910a066d), which security practitioners should review for remediation steps, such as updating to a patched version of sf-mcp-server.