gemini-mcp-tool vulnerable to OS command injection and @file exfiltration via prompt quoting (CVE-2026-0755)

CRITICAL 9.8CVE-2026-0755 · GHSA-4h5r-5jm8-jxjm · Published 23/01/2026 · updated 17/06/2026

Package	Affected versions	Patched versions
gemini-mcp-tool npm	`≥ 1.1.2, < 1.1.6`	`1.1.6`

Description

Untrusted prompt input could reach the Gemini CLI @file parser, allowing read/exfiltration of arbitrary local files (@/etc/passwd, @~/.ssh/id_rsa, @../../secret). On Windows, unquoted cmd.exe metacharacters could break out into OS command injection.

Fix (1.1.6): removed the broken shell:false double-quote wrapping; added assertSafeFileReferences() to contain @file refs to the working directory; hardened Windows cmd.exe argument quoting.

NVD description

gemini-mcp-tool execAsync Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of gemini-mcp-tool. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the execAsync method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-27783.

References

jamubc/gemini-mcp-tool security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-0755 · ADVISORY
jamubc/gemini-mcp-tool · PACKAGE
zerodayinitiative.com/advisories/ZDI-26-021 · WEB
zerodayinitiative.com/advisories/ZDI-26-021

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free

Package

Affected versions

Patched versions

gemini-mcp-tool

npm

≥ 1.1.2, < 1.1.6

1.1.6

Description

Fix (1.1.6): removed the broken shell:false double-quote wrapping; added assertSafeFileReferences() to contain @file refs to the working directory; hardened Windows cmd.exe argument quoting.

NVD description